You're right, lots of threads; just use the search function in the forum toolbar and search for chiller. This is a good one...
http://classracer.com/classforum/sho...hlight=chiller
I got a kick out of Tom Sheehan's 'pics from Indy' last year, chillers were thick in the lanes during class, believe last year's Indy was the max number I've ever seen.