GitHub have just released github for mac - handy tool if you're on a mac.
Announcement: https://github.com/blog/878-announcing-github-for-mac Website: http://mac.github.com/Doesn't do everything yet, eg bug reports, it does allow you to push/pull/view diffs/work with branches/view history/revert commits etc. It also does rebases if it detects it can do them without rewriting history - handy for avoiding lots of merge messages everywhere.
-- Robert http://octarineparrot.com/