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Uhm... that's strange. Can you try logging in directly with myopenid and tell me whether it works?
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)
@Scott: The bug you found is now corrected. At the same time I have made some small improvements: added "Share this on..." links, and made the navigation better in long sections (for instance you can now have a link like this ).
@Andrea,
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."