I guess I always expect UI chrome around CodeMirror, but yeah, it obviously says CodeMirror right there, DOH, I missed the color syntax highliting when I skimmed through. I still don't see how to do multifile commits all from the web-ui which is what I meant to reference. I can do one-off files on GitHub but they're a commit a piece.
Both GitHub and BitBucket are really close to letting me do significant editting of code from my browser which is still very useful for me. There are tons of times I'd love to be able to fire up GitHub and hack on some files without having to actually commit to persist changes. But then again, maybe I'm projecting feature creep on what is ultimately a VCS.