Ken asked a while ago about being notified about commits.
I asked about a commit mailing list on the gitorious message board. They told me I can follow an RSS feed for each branch. There was also some mutterings about making the post-commit-hook available in some way (this is just a script that git runs after commiting).
Do you guys use rss? On a MAC, you can get it to show up in your email.
-- Andy