Robb, you're looking for Network Attached Storage (NAS).
This is a box that typically has server functionality built in, directly connects to your network, and provides storage without the hassles of a server.
IOMega makes a industrial strength one that starts at $1,100 for 120gb with RAID-5 protection.
Click here for more
Linksys has a nice 80gb one for $500, that can be expanded with another 120gb drive.
Click here for more
There are others out there.
NAS is great. In addition to not having to maintain another box, these guys can be located in the closet with your hub. If they need to be in the office, they are also very quiet.
[This message has been edited by skofarrell (edited 02-15-2003).]