The U.S. Postal Service launched the "Mail Back" program. The program provides free envelopes to mail small electronics, like MP3 players and PDAs, so they can sent to Clover Technologies Group for refurbishing or recycling. The program is available in 10 areas around the U.S. like D.C. and Chicago but I'm sure as the program grows they will expand it.
A simple and easy way to save some electronics from the landfill. I keep getting amazed by the simple solutions to these problems. If you live near one of these post offices go and get some envelopes and send your unused/unwanted items for recycling. Just make sure you delete everything before you send them off!!