If you're going to host game servers on it some are closed source and require x86 (or x86 compatibility). Some also require quite some resources. If this is important maybe Intel Atom is an option. I read today they're going dual-core.

Quake1/2/3 servers are very portable though. I even ran this, with client, on SGI MIPS. Enemy Terrirory I don't know, its basically a Q3 mod.

I'd also love DVB-H on it because public television broadcasts (similar to the Beeb) on DVB-H are free here (already paid for via tax).