I just picked up a DNS-323 Network Attached Storage and I'm in love. I loaded it with two 1TB sata drives in a RAID1 configuration. I have two laptops and a desktop and I'm always doing design work somewhere in my house. This makes it so that all my files are in one place and can be accessed by any of my computer. It is heavenly.
On top of that, it has a built in FTP server so I can access my files from anywhere that there is an internet connection and an iTunes server (which runs a tad slow) so I can listen to any of my music anywhere.
Just wanted to recommend it. Total price around $400. Took me about two hours to set up (including formatting both 1TB drives).
EDIT: sorry, here is the link if anyone is interested