Hey, shortbread just linked up to a preview of some new shuttle boxen, with support for Athlons and P4s. Check it out here.
6 channel audio
2 (!) PCI slots
LAN, Firewire, and up to 165 Mhz FSB.
Also, there are links to the SV-25 on Shuttle's homepage. Well, as of yesterday, it was ONE link, but that's better than nothing...