After a first YLOD, I bought a slim and made a nice COOL coolingpad for it. I couldn't find a nice one at the online store and decided to make one. The result is great, the PS3 runs much cooler.
Sorry for the typo, I'm from Holland. Here is a small tut...
At the bottom of your ps3 (slim) you see the air intake between these lines
The parts what I have used are:
2 aliminium plates 40cm x 30cm
These Xilence 120mmfans are very quit
Led light strips to pimp the cooler
Something for the bottem of your pad to lift it
Some wires and a transparant placemat