Gamertell has posted a positive review of Nyko's Intercooler TS fan accessory for PS3. It also includes a gallery of photos of the Intercooler unit.
From the review:
"After reading a few forum suggestions on other sites that implied the PS3 ran too hot to remain stable, I contacted Nyko for an Intercooler fan system to see if maybe, just maybe, the system was over heating and a fan would help.
Turns out that it was and it did...
If you own a PS3, definitely give this a try."