I've been in the market for a NAS (network attached storage) and came across a MAXTOR 320GB SHARED STORAGE II NAS - S01R320 for $119 at Frys on-line site. This is a good price -- there are, of course, much bigger NAS available, but this one has 2 USB 2.0 ports on the back, so you can plug in additional drives for more storage AND it has a gigabit NIC. It also might be possible to replace the internal NAS drive with a larger one -- I haven't looked in to that.

It's roughly half the price of comparable NAS devices and comparable to just the cost for a NAS housing.

Just thought I'd share this.