The main details are at the EveryBlock blog, but I wanted to mention a few other things here on my personal site, to try to anticipate questions.
First, this has no impact whatsoever on my involvement with Django. MSNBC.com is half-owned by Microsoft (although it's a separate company), so I expect plenty of Microsoft jokes -- but that's all they are: jokes. I'm not going to start developing things with Microsoft technologies; EveryBlock is not going to be converted from Django/Python to .NET or any other framework, MS or otherwise; I'm going to keep using a Mac as my work and personal computer, although I'm tempted from time to time to return to Linux. All of this is well-established with the MSNBC.com guys; they're cool.
If anything, this acquisition will give me some more time to work on Django, because I'm no longer spending a lot of time negotiating, talking with lawyers and worrying about how EveryBlock will continue operation. :-)
Second, yes, I'm staying in Chicago. The team's main headquarters will continue to be here, except for our coastal EveryBlockers, Wilson Miner (San Francisco) and Paul Smith (Baltimore). I'm hoping I can still participate in the local Web startup scene.
Third, this has no effect on the EveryBlock open-source code (ebcode). The code as released on June 30 will continue to be available.
I'm happy to answer any other questions in the comments. Looking forward to a great next chapter of EveryBlock!