Very nice. If it had a key handler to collapse the current comment with all replies[1], then I think it would be heaven. (Helps with long tangent threads at the top of the comment page.)

I know, this should be a pull request...

Edit: BTW, I just saw '(-1 unread)' which I'm guessing has something to do with showdead being on.

[1] http://alexander.kirk.at/2010/02/16/collapsible-threads-for-...