I gotta disagree mrsteve :(

uTorrent is the shi7. Excuse my, um, lack of sensitivity :-p

uTorrent: Small footprint, uses little resources, and downloads like a mofo. Do your bitorrent searches with a couple select engines and bumba!, you're in business. You just have to know how to open ports on your router ;-) I've used a few client, including Azureus, which used to be my client of choice, but then I saw the light that was uTorrent :-P

/edit: One warning and you're out for the use of a minor swear :-( Loosen the filter qatari :-(