Check out my project
here.
10 basic air heatsinks on 10 40mm peltiers (rated as 137w). The idea is to run each peltier at no more than 5v (from the 5v line of my existing PSU, so no extra PSU required). Not aiming for ultra cold temperatures, but a little boost without using too much power. Also, I'm trying to do it as cheaply as possible.
The work in the link above is more like a prototype as I have made so many compromises. However, as a proof of concept it will show me if Im wasting my time or not.
ALso, its painfully slow progress though as I cant do any work on it whilst at university which is where I am almost all of the time. I have made some progress from the end of that thread, ill have to put some more pictures up soon.