There's a web site at http://data.stackexchange.com/ where one can run SQL queries against the database to make some interesting reports. Some of these are things like "What do I need to get a certain badge", which is cool. But there's others that I think could benefit the site as a whole.
That is, queries that provide useful information for users looking for somewhere to contribute, or else which display data from the site in a way that showcases the great content we have.
Note that data is updated monthly. So, queries may be less useful because the results are out of date. Maybe some of the more useful ones could eventually become Actual Site Features.
Since I don't know anywhere else to put them, I figured I'd put them here as a kind of community-wiki post, although I don't see a CW checkbox. If there's somewhere else this should go, or if this can be made CW, that'd be cool.