Soekris sounds much better
Anybody who finds these interesting should have a look at a Soekris box.
The fastest runs at 500Mhz and half a gig of RAM, and costs a little over €300 (more like €400, about £300, when you get through all the charges).
They are amazing little boxes for running as home servers / firewalls etc. They are upgradable, having hard drive connectors, PCI / mini PCI and USB connectors built in, plus they have 4 ethernet cards.
The only thing they lack compared to these cherries is a VGA connector (you can add a PCI card) and they use more like 10W, but that shouldn't matter compared to a normal 400W or so PC.
Mine runs OpenBSD a hell of a lot faster than any Windows PC I've ever seen and it won't randomly delete your backups like Windows Home Server...
If you want a PC substitute I think you can forget about these types of devices, but for a little data server, firewall, router etc I haven't seen anything better.
Plus, for Jamie Kephalas, the website doesn't play any stupid audio...