I like it, but I think the font's a bit too small. In the current version, the font can change according to the browser's Font Size setting, I think it should stay that way.
Another thing -- two orange bars at the top? Seems a bit too much. It looks better right now, IMHO.
Addendum: Well, now that's it's online -- it really looks a lot better (and more usable). I'm experiencing some problems with the embedded videos, though. They get out of the frame and show up on top of the next message.