I can now login (although there's a strange blank page with just a "Continue" button that isn't part of the usual OpenID sequence), but when I try to submit a book I get: "You do not have access to this action. Please login."

EDIT: in the meantime I tried to login with tqft.net (of course I don't know your credentials, so I went only up to the point where I should authenticate) and I'm indeed redirected to a Google page. Which is strange, because I tried using delegation on my web page, which redirects to a myopenid account, and I'm correctly logged in via myopenid. In other words, works for me :-)

EDIT: Ok, I found what's wrong. You should actually enter a URL, that is, "http://tqft.net" rather than "tqft.net". I may correct that for next version: addresses without a protocol will be given the prefix "http://". Why unknown addresses are redirected to Google is a mystery to me, I can only guess it's due to the library I use (I certainly hope it's not part of the protocol :-P)

I'm having trouble with your OpenID implementation. (This is likely because I use OpenID delegation.) My OpenID is http://tqft.net/. (The header of that page redirects OpenID agents to http://tqft.myopenid.com/.) When I type tqft.net, I get redirected to a my google apps login page (not appropriate, not even sure how it ends up there). When I type http://tqft.net/, I get to a blank page, still at your domain. Any ideas? Yesterday I managed to login using http://tqft.net/.

See also this answer by Andrea.

I also added a button to report issues with a book (incorrect data, broken links and so on), and these reports go to moderators, which can then edit the book.

For now I am the only moderator, but I'd be willing to give moderation powers to other users. In particular to any high reputation (>= me) user of MathOverflow, so please contact me if you are interested. Otherwise I think I will just browse the list of subscribed users and look for known names :-)

Ah, and please let me know if any of the bugs mentioned is still present.

As for the mail resulting as spam, this is very unfortunate. I did not have this problem, and I have a Gmail account, but I will investigate. I do not know how to persuade the Gmail people that what I'm sending is not spam, though. :-(

Also, my confirmation e-mail was caught by my spam filter. If it can happen to me it can happen to others so maybe the confirmation e-mail should be modified to help prevent this.

1. New user creates a standard account.
2. User associates that account with an OpenID (Program tries to authenticate that OpenID, if authentication is successful, association is made).
3. User can repeat step 2 for as many OpenIDs as they like.
4. User can now log in either with username/password or via OpenID.

So I wouldn't rely on OpenID for supplying any information in the account creation process. I figure that a user who wants to use the site would be prepared to fill in basic information like that.

Now, if I want to merge the existing user system with OpenId, I need a username and an email. The email may be set to a default and changed later, but at least users need a username to be identified. Moreover one cannot modify the username, since it is THE identifier for the standard login system, as opposed to the OpenId account. Note that MO does not have these problems because it uses ONLY OpenId.

My solution would be to ask for these details on the first login with OpenId, but is this really more convenient than registering a new user altogether? What is your opinion on how should I implement this?

I don't have a camera either, which is unfortunate because I have probably two thousand printed pages from books and notes that I may one day read =D.

EDIT: I tried to add a review and it worked for me, but I get redirected to the wrong page (so I guess it works just because I'm admin). This is strange, as everything is working well in my local install. I'm really sorry that such a bug made it to the final version, and I'm fixing it as soon as possible.

EDIT2: I'm now starting to understand. It seems the people at my hosting service made a mess with the filesystem and did not recover everything correctly. I'm not even able to access the relevant files via FTP! I have to reinstall it to fix this, and I'm doing it as soon as possible, probably monday.

@domain: I stupidly thought about the name and designed the logo before I checked for available domains. I'd need a new name and logo to change. If anyone is willing to provide suggestions for a name, I may try to change the logo (but any help with that would be appreciated too).

@editing books: I'm all for that, but what is a good way to prevent vandalism? Maybe I should just relax and do it the wikipedia way. I was thinking about a button to contact moderators to suggest problems with the book (wrong info, outdated link, irrelevant material, spam and so on) but maybe this will not be feasible if the site grows larger. Even more considering that for now I'm the only moderator (but I'm more than happy to give moderation powers to interested users with high MO reputation, as soon as I design easier tools for editing books).

@openid: I don't know if that is easy or difficult, I will investigate. In any case, the site is programmed from scratch in CakePHP and Jamal/Jquery, and I'm not willing to port it to a CMS; that would be far more work than adding the openid.

@the v sign is bad: I already received a similar suggestion, so it will probably change into a lens. And yes, I may let the title be clickable too.

@autosuggestion: It already is there. If you just start typing "miln" you will be prompted with the full name. I @better interface: I agree that I may show the rating and the number of reviews on the front page. I was also thinking at a voting system on reviews, much like on MO, in order to show the highest rated review on top. I am less convinced about moving the logout button away from the top. If other users have some opinion on this, please tell me.

I hope I will be able to implement all this stuff next week. I knew there where a lot of things to fix, but I thought it would be better to launch the site and hear people suggestions rather than making it perfect for me before actually having any content.

Edit: I just checked and found that both joomla and drupal have openid support. So for sites designed using these, everything should be easy enough.

As of now, it is a subdomain of andreaferretti.it ... Would it be possible to have a full domain for itself?

@Jonas: What operating system are using? I use a different font in Windows, since there are known problems with the cleartype technology and the rendering of fonts in many browsers. As for the users profile: yes, this is one of the things I plan to change, but again, I will be able to work on the site only on next week.

Thank you very much for your suggestions!

Andrea: this looks great (this morning I saw it briefly). I am trying to open it now, but seems the server is down, may be because of David's advertisement?

Registered users can add new books, add tags, write reviews, vote, keep a list of the favorite books and see other people's profiles. The level is usually from university mathematics on, even if it is possible to add elementary resources.

The site is just born, and every contribution is appreciated. You can simply use it to to find material, or better you can register and contribute, or advertise it with your colleagues and interested people. More features will be added on the way, and every advice is welcome!

My question here is the following: is there an opportunity to advertise it (if you like the idea and the realization) in some way on MO or here in meta? Of course, as with every site with user-generated content, the more public exposure it gets, the more opportunity it has to become a repository of useful material.