OCIA.net has posted their review of the Thermaltake NBcool T500 and T2000 USB Notebook Coolers.

I looked at the little 1.5" intake hole, then looked at the bed, the carpet, the dining table (which has a tablecloth with some brocading on it), the sofa, all over the house. I found very few spots that I might use it without some kind of interference with the fan intake.

Thermaltake NBcool T500 and T2000 USB Notebook Coolers Review