Fun with Greasemonkey

I just discovered the wonders of Greasemonkey, FireFox's resident scripting app. For the most part, I was messing around with Facebook (there is no such thing as a dislike button. >:/)... But hey, it has some pretty neat functions. If I don't find something like that for Chrome, I'm switching back to FireFox. Found anything interesting in the realm of scripts recently?

The Gmail Scripts help me out a hell of a lot.