From  Irvington Green Initiative Newsletter:

Sears and Radio Shack are both initiating programs that keep electronics out of the landfill:

Sears customers can earn store credit in exchange for trading in pre-owned electronics that have been determined to still hold value.  Log onto www.sears.trade4credit.com and enter the details on your device to get an estimated trade-in value. The program will accept electronics like iPhones, digital cameras and camcorders, MP3 players, GPS systems and gaming systems.

RadioShack is rolling out a new program that will allow customers to exchange certain used portable electronics for a RadioShack Gift Card. Acceptable items for the RadioShack Online Trade-In Program include GPS devices, MP3 Players, wireless phones, digital camcorders, car audio head units, digital cameras, notebook computers, game media and game consoles.  Customers who accept the trade-in value for their used product will be mailed a RadioShack Gift Card that can be used toward the purchase of new products in RadioShack stores nationwide or at RadioShack.com.