Size, power consumption, & noiseI don't think for the cost it would really be worth making it into a server when you could make a server with better specs for much less.
Has someone else thought aboout using Apple TV as a Linux server? The hardware specs sound promissing, at least as a mini server.
Jochen
A used G4 Mini would probably cost about the same and would be much easier to set up as a server. Just run OS X headless and it's basically FreeBSD, or VNC into it. You could also get a wired ethernet port and a firewire port for adding external storage. The only thing you'd miss is 802.11n.