Cool! Rated 5 out of 5 stars
Very neat. About the only thing that I would want in my wishlist for such a great plugin to do that it doesn't already is if I hit F11 for fullscreen, it would be nice if that hides the bar regardless of the settings.
Also, I got a little confused when I installed it, thinking that it was a toolbar to allow me to submit things on a site with the click of a button as well (a la stumbleupon) but this is actually more useful and streamlined than such a thing. Doubtful I'd even want another permanent addition to my toolbar anyhow, so yeah. Great plugin. Keep up the good work.