GitHub now has even better commenting on commits. Better UI (collaborator highlighting, comment preview), better functionality (repo collaborators can edit anyone’s comment), better aesthetics. I use Git. I’m not wild about using it. I could take or leave it, to be honest. But I would stand in front of a tank for GitHub.
There are many geeks out there with a soft spot for Mercurial, or Bazaar, or darcs, or an even-more-neckbeard-y DVCS, and they often wonder why Git is getting all the love. It’s because Git has GitHub. Mercurial seems to be feature-equivalent to Git (at least in my limited experience), and Mercurial has BitBucket, which seems to be pretty good. But it’s not as good as GitHub.
Nobody should be ashamed that they can’t replicate GitHub’s success. It’s really hard to do the web well. It’s hard even to really smart people, of which I’m sure there are a few at BitBucket. The only people who think it’s easy are idiots. You can spot these people easily: they’re the ones who comment on TechCrunch posts and chortle that they could build a Stack Overflow clone over a weekend.