While there have been a number of voices here lodging complaints against the new Admin Bar in 3.1, I'd like to buck the crowd -- sincerely, and not just to buck the crowd -- and say thanks!
I think the new Admin Bar is a very useful, practical feature. It was getting a bit tiresome having to go into the Dashboard each time that I wanted to make a new post...which is one or more everyday.
I have no problem using it with my tweaked version of the TwentyTen theme, because my top div box is 3em down from the top of the browser window.
Question: Exactly who can see the Admin bar? Only the blog admin? Logged in members? Guests?