The window I'm typing this in takes up.....724 x 490 pixels at a res of 1024 x 768 .....way too generous/wastefull......almost 50% of the screen realestate.
This, and other 'generous' layout allocations means one heck of a lot of scrolling.
A one word comment takes up about a third of that...or around 15% of the screen.
Reducing these might not speed up site loading but it'll certainly aid with site navigation....
PS...I think the smilies are a step in the wrong direction.....the originals were far more distinct.... a la