Take it away, Wikipedia. A huge thanks to Krista for this AMAZING site.
thesixtyone (t61) is a streaming media website that uses collaborative filtering to organize, promote, and sell music uploaded by artists, many of whom are independent musicians. The site was founded by James Miao and Samuel Hsiung. It was released in alpha form January 2008.
The site takes its name from Highway 61, a route with deep connections to American music culture. According to the site’s “bazaar” where users can purchase songs or mp3 albums uploaded by artists, “thesixtyone’s guiding principle is to enable the creative middle class, providing talented artists the opportunity to make a living making music.” The site also allows artists to license their music under Creative Commons licenses and allow free downloads.