Anybody who´s running Slackware ARM on their Raspberry Pi and is interested in running a BitTorrent client, with virtually no overhead, should check out rTorrent.
We´ve created a HOW TO guide (for those who need it) to assist with installation and setup of rtorrent: http://rpi.fatdog.eu/?p=rtorrent-arm
If you have no need of the guide and just want the necessary packages they are available here: http://rpi.fatdog.eu/?p=downloads
The libsigc++, libtorrent, and rtorrent packages available in our guide have all been created using SlackBuild.org scripts (many thanks to alienBOB <3). The rtorrent client has been thoroughly tested over the past 7-8 days and has performed flawlessly, without any errors. A Raspberry Pi model B (Micron RAM) version was used intentionally for testing because that´s the one which seems to give most problems, but there hasn´t been any! (It´s surprised me, to say the least!)