I don't know who else has heard of this, but ZALMAN is coming out with a monster. I love Zalman, they have always been very innovative, and after seeing this I consider this to be their crowning achievement. It's called the TNN500A. Have a look. The only moving part in a system built in this thing would be the harddrive, which itself gets noise reduced. According to the PDF, the CPU cooler which uses NO FAN has 150W/second of cooling capacity!!! That's not the half of it. Apparently Sharkacorp plans on selling it, but I'll bet it's gonna be VERY expensive. Here's the link:
http://www.sharkacorp.com/pdf/TNN500A_Catalog.pdf
http://www.sharkacorp.com/pdf/TNN500A_Catalog.pdf