It'll cost you a little postage, but Yemm & Hart Ltd, a small green building company in Missouri, will gladly take them off your hands….and with 15 billion corks in circulation around the globe each year, it might not be a bad idea.
What does Yemm & Hart do with all those little poppers (one and a half tons of them to date)? Floor tiles, of course, and they'll even return a complimentary sample. Check out the website link for further information on the program or mail your corks to:
Wine Cork Recycling: Yemm & Hart Ltd., 425 North Chamber Dr., Fredericktown, MO 63645