While I really like Asus products (I'm very happy with my eee), maybe the msi catalog is also worth a look. Both windbox and windnettop look like interesting fanless desktop replacements in the same line than the eeebox. If you want to have your own server the idea of accompanying one of these devices with plug computers and/or some cheap NAS looks funny, but given the current price of VPS I don't think home-servers are well worth any more.
PS[OT]: you would not get rich this way, but I would buy such a thing for a reasonable price: 1. find the right (cheap) plug computers to run plan9 cpu servers, the right nas device to run venti, and the right eee/wind/whichever terminal. 2. preconfigure everything and package it in a cute box. 3. sell it. 4. profit! 5. goto 1 -- - yiyus || JGL .