Peltier stacking have always been denounced by people as not workable, but here's a real life example of pelt stacking. And as if that wasn't enough, he's running chilled water as well!
http://www.cisnet.or.jp/home/masamoto/sub04.htm
http://www.cisnet.or.jp/home/masamoto/sub05.htm
Detailed diagrams of how it was implemented as well.
This Japanese guy is amazing. Here are some of his other works.
http://homepage2.nifty.com/masamoto/
http://www.cisnet.or.jp/home/masamoto/
http://www.ne.jp/asahi/simanto/oc/UltraVapo_unit.htm
Top-notch implementations!