"Hip-hop has been a commercial proposition since the release of 'Rapper’s Delight' in 1979. That’s 30 years, a long time for any genre," writes Sasha Frere-Jones in this week's New Yorker. The genre, according to Frere-Jones, is on the way out. Not so for Chap-Hop, however, which has been going for about six days since the video below was put up on YouTube, featuring Gentleman Rhymer Mr B.