I've suggested people use it for their office documents.
And I just googled before posting, but it looks like it's been ported to git: http://code.google.com/p/tortoisegit
The article at least implies that you'd be better off on the command line and it's not that bad. But my experience is that to others it can be a turn off.
http://github.com/brotherbard/gitx/downloads
I don't actually use it to commit because I have a screwy commit flow, but I'd expect it to work for a basic commit cycle.