I use the towel drying method Mike has on here, works very well. I also bought a simple dish drying rack. It lifts them and allows air to access the foam when laying face down. I can fit six 6.5 pads easily at one tme.
Another good drying method is to use a cooling rack, like your wife uses to cool down the cookies or cake. Put em on top of the refig and they have warm air flowing all around.