I have to wonder if it's not just a coincidence that he's not only shutting down chicagocrime.org at the same as he's launching his new, related company everyblock.com, but also redirecting all traffic to the new site...

Anyway, it was a cool site, and it inspired me to write something similar (though less elegant, and currently not updated) for my university during a 24 programming contest a couple years ago:

http://toobs.tlrobinson.net/