Microsoft Blog --"Actually, the cluster is a dual boot Linux/CCS cluster, which makes it even more interesting than the headline. The machine is reported to have 1,1151 Dell servers with dual-socket Barcelonas for a total of over 9,200 cores and will be housed at the University of Nebraska, Omaha."
We recently published a whitepaper which details howto setup such Linux/CCS dual boot cluster. Go grab it @ http://www.microsoft.com/downloads/details.aspx?FamilyID=1457bc0a-eaff-4303-99ed-b199ab1c0857&DisplayLang=en
Microsoft, Windows, Linux, Windows Compute Cluster Server 2003, Linux Cluster, Cluster Server
Source:? MSDN Blog