Uridium,
For the past 2 months I've been running Ubuntu Feisty Fawn Server 7.04. This is linux based on the Debian system. See
here for more details. The Live CD can be run without installation. Why not just go for it
And I love it

I'm running an old AMD Athlon XP1800+ with 512Mb Ram on a 30GB drive secondary drive is 500Gb for music, film, photos etc. This machine runs a treat and much quicker than an Athlon Turion 64 2.0Ghz, 1 Gb RAM running Win XP.
From my Ubuntu server I serve 1 linux laptop (mine) and 2 XP desktops (kids) and a Netgear EVA8000 HD media entertainment centre. Install TwonkyVision uPNP server software and your Soundbridge will stream music from your server. This is the bit I want next for my kitchen. The TwonkyVision/Soundbridge can be controlled by a WiFi/Bluetooth Pocket PC running Rudeo Play and Control.
Food for thought.