If you press the lozenge shaped Aqua button - the one that seems to do different things for different applications - on the top right of the BitTorrent client window, you can restrict the maximum upload speed to an arbitrary value. Useful if you want to stop BitTorrent from hogging your bandwidth, especially if you’ve got an HTTP server set up etc. Just thought I’d point that out as it’s not an obvious feature and understandably so; if every BitTorrent user restricted their upload speed, the software would suddenly become less useful. Hmm… maybe I should keep schtum.