After having seen a few learn-git tools on HN and other programming forums, I would have to say that this is my personal favorite. What this tool does exceptionally well is teach the core git concepts from a visual point (seeing as it's git this works very naturally) instead of asking the user to memorize an incredibly small subset of the git commands. Often this leads to a lot of trouble when you get into a real-world scenario that some inappropriate learn git tutorial didn't cover. Fortunately, I think visualization tools like this should help ;) Perhaps github could incorporate this into their Try Git page?
