If you're handy, I'd suggest getting a first-gen ATV. You can install OS X Tiger on it, then you're left with a semi-functioning computer with a 1GHz Celeron M and 256mb of RAM. Core Image and audio don't work though (though you can use an external DAC). Then you can use it for torrents, jDownloader, samba shares etc. You could leave it headless and use VNC to queue up a torrent.
Just a thought 😛