Horde's version control browser, Chora now has initial git support. All three Horde git repositories (some more info available at http://horde.org/source/git.php) are browseable through the repository menu in the upper right at http://dev.horde.org/h/chora/.
Chora provides a traditional tree-based view of the repository, with histories available in each individual file. We'll definitely have commit-based information (as we already support changesets in CVS and patchsets via cvsps), and we're looking at having more of a git-centric history view as well. But if you need to interface with your repository through PHP code, or if you're used to a primarily tree-based version control browser, or if you already use Chora or Horde, you might find this useful.