I've been looking at the following:
Netgear SC-101
Pros - 2 drive slots, could use up some old IDE drives I have lying about. RAID.
cons - Custom driver needed to connect to the box. No extra features. No drive included
Icybox NAS2000-B
Pros - Small, low power, straightforwards.
Cons - Expensive for such a basic unit. Single drive limit.
Qnap TS-101
Pros - Full features, RAID, bittorrent downloads, basic web server with PHP and SQLite
Cons - Moderate reviews, expensive, no drives.
Synology DS-106E
Pros - Full features, bittorrent downloads, complete web server with PHP and MySQL, Media Server
Cons - Expensive, no drives, BT support supposedly a bit dodgy, no raid

I'm leaning towards the last one. It's a sweet piece of kit and I can bundle it with a 320Gb drive for ~£225
Anyone had any experience with home NAS setups, or any of these?