Eliminate Talking from the Radio
I can remember that someone invented a video recorder years ago that was supposed to omit the commercial breaks when recording a movie. I guess the system wasn't fail-safe, so it never made it to my home.
Anyway, it should be much easier to cut off all the talking from a radio station. I've given up listening to our local radio stations a long time ago because of all the commercials and brainless blabla, but if all the talking could be replaced by silence (or maybe by music from another radio station) I'd be the first to turn the radio on again.
Reward: A home stereo equipped with this technology.