OT: Low-poer real-audio player

I know this is off-topic, but I'm looking for suggestions and a solution may involve a "vintage" box. If you feel that discussion of this on-list isn't appropriate, please email me privately. Here's my situation. I like to listen to web-based radio and I transmit an FM signal so that I can listen on any FM radio. It works very well and I'm happy with that aspect. However, the system doing this is an old built-like-a-tank 500MHz P3 Compaq Deskpro box running RedHat somehing-or-the other (it's been so long since I've upgraded it that I don't remember) 24x7. I'd like something that drinks less power. Interface to the web is via 100BaseT copper. Station switching is accomplished via a simple shell script and initiated via telnet. My current thought is that I could pick up something like an HP e-PC and equip it with a CF hard drive. But a 1.7GHz CPU again seems like overkill for a very limited application. Does anyone have any other low-power ideas? Note that most of the streams I listen to are RA, not MP3. Thanks! Chuck