Glyde has an interesting take on used games. The service allows you to sell your old games (CDs and movies too!) and give the proceeds to the charity of your choices. The process is straightforward and requires minimal effort. You list your game, it sells, Glyde sends you a mailer, you put the game in the mailer, drop it in the mail, and you’re done. It’s altruism made easy!
If you have any used games and want to use them for a good cause, give Glyde a shot. I’m going to make an effort to dig through old games and movies after E3. Anyone want to joint me (in donating, not at E3)?