I was interested in building a no-moving-parts audio
processor machine,
mostly for gigs, but I need to get the fan thing sorted out.
This issue is exactly what I'm working on for a magazine feature.
I've been talking to
http://www.ultim8pc.co.uk/ about supplying the parts. If
you want total silence you'll need the passively cooled VIA EPIA-M6000.
Cheers
Daniel