So who's got it? Strasburg? Drabek? Tillman? Someone else...I saw a random Braves lefty with a sick hook but I can't remember his name.
My personal favorite is Christian Freidrich's because of the 12/6 action and the power in the pitch. The power man...That guy's going to be a really good lefty. Strasburg comes next, but his is less consistent and often looks more like a slider. It's arguable that this pitch as either a curve or a slider is the best out pitch in the minors.