Before I go ahead and try to build my very own case to do this... has someone bought a mini-ITX board like the Atom-based Gigabyte GA-GC230D, and removed the small CPU fan that comes with it to replace it with a slower, quieter 12cm fan mounted on the case, right in front of the CPU heatsink?
Here's the plan:

That way, the PC will be quieter, and thinner since I'll save room between the heatsink and the case.
