I downloaded uTorrent for OS X, and it will not execute/run. The icon pops up, and immediately quits. I figured maybe I downloaded a 10.5 BETA, so I downloaded the older BETA, and the same thing happened.
Are you running Tiger? Unfortunately uTorrent's only available for Leopard.
Very happy with it btw compared to Azureus, it's not nearly as bad a system hog.