It also features an 800 MHz ARM. I does only have 256 MB RAM, but does a decent job so far. Couchpotato/Sickbeard + sabnzbd + transmission run fine. Timemachine backups also used to work fine, at the moment I have a little bit of a problem with them. That might be due to me hacking arround on the system too much though :)

[0] http://blog.marc-seeger.de/2011/03/20/the-western-digital-my...