Hi all, works with ST3 now and is in Package Control. Only thing missing is Windows support (looking into it). Thanks for the comments and pull-requests :)
For fun I just created a Sublime Text 2 plugin that lets you bring up the git blame->show for selected line(s) of code with a simple shortcut (cmd+shift+m on Mac, alt+shift+m on Linux/Windows): https://github.com/cbumgard/GitCommitMsg
Thanks for writing this. I work right by there, walk to work from my home, and know how you feel. As jaded as it can become on a daily basis, empathy is always a good thing in my opinion.
This rocks! I just added one to (one of) my for-fun side projects here http://quantumrandom.com/ after playing with the bookmarklet. Thanks for sharing this.
Although Contiguous Integration sounds intriguing.