Another option now is http://windows.github.com/ Github for windows. But only really if you are syncing with GitHub. I've been using this for a few weeks, and I do find I need to fire up a shell from time to time. Its also unclear what commands its actually issuing. I keep ending up in the middle of a broken rebase - but I have no idea why its rebasing! But for frictionless use 99% of the time its great.
