Also, if you're interested in what I've been working on lately, check out baconfile.com (web interface for sharing files via Amazon S3) and leafychat.com (web IRC client).
Leafy Chat looks really neat. The design is a significant improvement over mibbit.
I agree about the design. Unfortunately though, the client connects to freenode as <username>@baconfile.com. Not something freenode is too kind toward, considering the mibbit fiasco.
We're working on a fix for that right now. Freenode has been incredibly patient with us which is cool (thanks!).