Here: http://mac.utorrent.com/beta/
Apparently it's Leopard and Intel only at the moment - seems to work pretty well though
Apparently it's Leopard and Intel only at the moment - seems to work pretty well though

I've never used torrent programs myself so will this open up a serious security risk for OSX?
Sounds a bit like voodoo to me. I doubt there's much difference in attainable download speeds between non-broken clients. They're using the same protocol after all. The typical torrent is just a wild west of flaky/overloaded trackers and leeching.
I've seen my connection's download speed maxed out (up to ~2.2 MB/s) on every client I've ever used for Windows or OS X, given suitable 'swarms'.