Soda makers Mountain Dew have launched a web-only music site, Green Label Sound. The site is still in its infancy, but it already boasts a pretty good exclusive track by the Cool Kids, dubbed "Delivery Man." The song is available as a free download. The site also promises an exclusive song soon from indie duo Matt & Kim, as well as two more artists coming in the fall. We're not sure if this is some kind of promotion for an ad campaign or Mountain Dew's attempt to enter the blogosphere, but so far the tunes are better than Code Red.