There's currently a process going on at Area51 to propose and create new StackExchange 2.0 sites. A general mathematics (i.e. not research level) site has been proposed, and they have a list of on-topic and off-topic questions to help define the scope of the site. At this point, they want a certain number of people to "commit" to participating in the site, as a way of ensuring that it's viable. If you're interested, you may want to head over and sign up.

Now, I'm not actually planning to regularly use a "general mathematics" StackExchange 2.0 site, because my understanding is that it would be rather dull! :-) On the other hand, I think it might be very useful for us if such a site existed, so we could point people there. In fact, it may become possible in the near future to actually migrate questions there rather than just closing them! As such, I'm not going to hesitate "gaming the Area 51 system" for our selfish ends.

(Full disclosure: the link I gave has a referrer code in it corresponding to my Area51 account. To my understanding, the effect of this is that if you "commit" it will say something like "Referred by Scott Morrison" under your name in the list. Here's a clean link if you prefer.)