In this recent article in "the Register" Intel is floating the concept of data centers being too cool and thus wasting power. See http://www.theregister.co.uk/2009/08/31/data_centers_run_too_cool/.

I believe that several things need to be researched before we make a mass exodus to 80 degree F+ server rooms. The article mentions warranties from manufacturuers that specifically become null and void if the equipment reaches certain temperature levels. Although Intel is raising the question , they did not appear to be making any modifications to the terms of their warranties. This will bear some careful study and testing.