Can you build a Windows supercomputer from parts and run a parallel Fluent CFD calculation for an airliner in a day?
The HPC Institute at Southampton set this challenge to a dozen 17 year olds, and they did it! Not only that, they flew their designs in Microsoft Flight Simulator too :)
See the video to find out more:
http://www.soton.ac.uk/~ktakeda/temp/2305_Smallpeice_Trust_02.10.06.wmv
This residential course at Southampton was run by the Smallpeice Trust, and was sponsored by Microsoft Research Cambridge. Powered by Windows Compute Cluster Server 2003, of course!