I meant to link to this earlier but it just got lost.

John Walsh at The Hardball Times applies linear weights to pitches to try and put a run value on pitchers' pitches, with some interesting results.

Essentially, he finds Heath Bell, in 2008, had the best fastball, determining every 100 times he pitched it, Bell allowed 2.7 runs below expectancy. Shaun Marcum owned the best slider, Jeff Francis owned the best change-up, and the Lord of all Charles's belonged to a pitcher called Wandy.

Good stuff. And Dave Allen used Walsh's methodology to look at the best pitches in 2009 so far. Apparently Wandy is still good, but not-a-big-game-pitcher Javier Vazquez's curveball is just nasty.

Anyway, I expect to see this in a full database through the Retro Sheet era, updated daily, within the next five minutes, or I'll be upset.