I was in the process of leaving this as a comment (when I noticed the meta thread), so first the comment:

In the AMS's 'defence' there is an AMS blog named 'On the market' (also some others). From a cursory glance it seems not that active; but perhaps this is also since "everybody" asks here rather than there.

And, there is also academia.SE (and contrary to the comment of OP it seems simply not true that this is so PhD students related; perhaps there is relatively more on this, but it is definetly not exclusively on this). Indeed, before the existence of academia.SE I was somewhat welcoming towards such posts, but now I see little reason not to direct them there. (Repost there, close on MO and place a link on MO; to steer the 'traffic' towards there.) Of course, as long as such things are tolerated on MO it could likely (always) stay better or more convenient to ask here and impede or slow-down the development of other activities.

I did not vote to close this question either so far (not to further cultivate my reputation), however the present question in some sense seems rather particularly off-topic. What is the point of disussing on MO the general merits of some other website(s); the MathJobsWiki mainly I assume, though not even this is made clear in the question.

@voloch: I agree a blog cannot be a substitute for what seems needed. Only, what I could well imagine is that if this blog, whose existing posts seem nicely written, had more comments/active readers (there seem hardly or even no comments) then more activity would/could develop there or around it. (It is perhaps, but I cannot know, a bit of a chicken-and-egg problem: noone comments since it seems not so active, and it is not so active since there seems no active interest.) Or, in a different direction, the people in charge of this blog could be potential contacts if somebody should consider the idea to contact the AMS in some way.

But, I admit that my comment was also in part influenced by a (perhaps irrational) feeling of frustration that some seem just not willing to consider using any other site/resource than MO (except if forced to). I think I can rememeber no occassion where somebody said when academia.SE was suggested something like: okay, I will give it a try. I only can remember plenty of, sometimes slightly contrived or even counter-factual, arguments why this definitely is a non-option.

Now, I think I should stop with my mini-rant, since you certainly need no additional convincing regarding this problem.

And, thank you for the final sentence, this was very kind.

At academia.se there is a mete thread about how can they get other academic specialties to come there... I hope, if his question is closed in mathoverflow, the OP will try it there.