Dave Carroll created perhaps the most successful gripe against a misbehaving company in the history of gripes, doling out Web-style justice with a remarkably viral -- and sarcastic -- music video. Now, he's trying to share his formula for success with other consumers on a website named Gripevine.com.

The site, which is free for consumers, is the latest in a crowded field of Web services that aim to act as a megaphone for aggrieved consumers who otherwise feel ignored when companies do them wrong.

Carroll suffered every traveling musician's nightmare in 2008. When he arrived at a gig after a flight, he found his guitar had snapped in two. The Canadian musician’s nightmare became United Airlines' nightmare after he posted the video.