http://www.contrib.andrew.cmu.edu/user/ebuehl/pool_cooling/
And the ubiquitous Slashdot thread:
http://hardware.slashdot.org/article.pl?sid=07/01/06/1410219
And the ubiquitous Slashdot thread:
http://hardware.slashdot.org/article.pl?sid=07/01/06/1410219