Overall it looks pretty good, I don't like the flash headers for your posts though.

I do like the expand/close that's really slick.

One other thing I would change is the comments box, I like how all the comments are listed down the right side of the box but there's a white line running through them all. If you could raise the comments above the bar/line behind them I think it'd look better (maybe this is just my browser though...)

I really like the expand/close as well. Can you share how you accomplished that?

The only thing that I would change is your header font. It looks a little blocky on my end--hard to read the font.

Otherwise it looks good. Few tricks, not too fancy. Well done.