This is great. I hate maintaining a fork of gitx myself, and actually gitx is markedly inferior to a high-quality commercial Mac application. There just haven't been any of those for git yet.

For Subversion, there are Versions and Cornerstone, which are really much more pleasant to use, but nowadays of course most of projects are using git. So I am stoked to see a promising developer take this on. I'm sure he will make a run at adding missing stuff like optional inline diff viewing and whatnot.