Gallery allows comments, but I'm not sure if that's what you're looking for.

Yeah, I was thinking of something a little different, although I may end up hacking up Gallery (or IDS which I currently use). I'd like something that is meant to work chronologically. Maybe with a calendar like interface to allow you to go back in time, but with the main page (or top of the main page) always being todays photo and comments.

-Mike