I don't know what some of you are whining about that transparent menu bar. It has to be transparent for the wallpaper to fully show. There's no other way. Would you rather slap a sharp white-grey border on top of your beautiful desktop picture?
I would not have a problem with them toying aroung with gimmicky features and unnecessary resource suckers like the transparent bar and cover flow in the finder, if they could get more vital stuff working first.
For example, i can't make it a universal setting to display finder windows using spatial navigation. Every new USB stick/external drive etc, is displayed with "browser finder". I have been praying to His Steveness since OS X 10.3 for that tiny little thing.