The RSD5 Solid state fan would be so useful for Amigans. For SAMs in tiny cases and wedges with 040/060 or PPC cards. It's made by Thorn Micro Technologies and was previewed in 2008.
This is the video of it in action:
http://gizmodo.com/369860/video-rsd5-solid-state-fan-in-actionIt was going to be for sale come 2009 but I can't find any up to date news for it. Has anyone else heard anything about this great idea? Please share if you have.