I signed up to volunteer for WHRO (our local PBS station) for a pledge drive.  I have donated to the radio which we listen to and the kiddos watch Curious George on the TV station.  I mistakenly assumed, though I knew it was a TV pledge drive, that I was going to be in a phone bank not in front of the camera.  It ended up being pretty fun and I signed up again but this time for the radio pledge drive!