I've considered doing this for a while, too. I went to far as to make a post-commit hook script for subversion to post to twitter, but it was friends-only so only my collaborator and I could see it.
Even better would be to post the diffs :-P
Would people be interested in seeing the svn changelog on my current project?
I'd love to set an ethographer loose on this, and see what insights they have about how programmers and programming works. Might make a nice PhD thesis for someone :-)
There have already been a bunch of academics studying the version control histories of major open source projects, for example as a means to gain insight into why open source development "works" (i.e. is able to produce very high-quality software). One of the cool things about studying an OSS project is that everything is public, and the vast majority of the communication happens via an archived, digital medium: you can correlate VCS history with mailing list activity with bug tracker activity with website traffic logs, for example.
When I think about doing this myself I immediately start coming up with flimsy excuses for why I can't. I believe a lot of doing a startup well is daring to put yourself out there to be judged. This is right in line with that idea (to an extreme). Brave and commendable.