"Turn-Key" Linux-Based Fileservers?

idjitProof asks: "I work for a non-profit organization with about 70 satellite offices. We're trying to find a cheap way to get these offices out of the stone age and into an ethernet with centralized, secure file-storage. I was wondering if there is a Linux hardware solution that is fairly dummy resistant or, alternatively, remotely configurable (with decent security). I spent the better part of today searching the web, but all I could find was boxed software products, no hardware solutions. I'd appreciate links to any companies that might have this kind of product."