As a follow-up to a comment I made in my last post -- Chicago is a RED hot market for data centers. ZDNet has an article "Bragging Rights: Chicago as green data center powerhouse".
It mostly talks about the new Microsoft data center, but lists the reasons why they chose Chicago. It seems like the hot area has shifted -- it was Texas, is now Chicago, and who knows where is next! Hopefully Chicago will not become as over-crowded as Texas is now.