Walgreens has the Clean AirBall CAB011 Portable HEPA Air Purifier - White (also Blue and Pink) on sale for $25 with free shipping. Normally around $50. Features HEPA filtration which removes 99.97% of particles at .3 microns and a noise level rating of 32dba.
I ordered one even though I couldn't find anything about the product on-line.
Anyone know more??