Over on HGTVpro.com; Andrew and Stacy, The Green Team, write about cork flooring pros and cons:
Popping the cork - getting to know cork flooring
I think cork is an ideal product for kitchens and other rooms where you want a smooth, cleanable floor but hardwood won't work because of noise transmission.
Cork has better sound dampening characteristics than any other hard surface flooring.
Easy on the feet, legs, and back too!
Peggy