Woo, the GNOME git migration is complete. We got the bulk of the repos converted Thu-Fri last week, but it took a little longer than estimated because of an update to the the commit message rewriting step. The remaining days have been spent trying to fix and reimport the repos that were broken during the import. I sent out this status a couple of days ago, and just now I copied the last fixed repo in place on git.gnome.org.
I'm looking forward to closing the door on this and to contribute to GNOME through git. And now that I have the scars to prove it, let me just end by saying: friends don't let friends use svn.