Just thought I'd share an interesting bit of information I found.

While crusing Cray, Inc.'s website (http://www.cray.com) I found a list of the supercomputers they 
market:

Cray MTA System
Cray SV1 System
Cray SX-6 System
Cray T3E System
Cray X1 System

-> Cray HPC Cluster System

Check this out - Cray's HPC Cluster System is a couple of racks of *DELL* servers runing Linux in a 
cluster configuration.  Apparently, they market it and support it as one of their own.  

Good to see Linux has a place in the Supercomputer Industry - and with the market leader, at that!

-Lucas