clipped from lifehacker.com

The Hype Machine aggregates MP3s from the vast world of music blogs. Searching for an artist in The Hype Machine returns tons of results, and you can stream the songs inline in the results. The site itself provides links to buy music at Amazon or in iTunes if it's available, but you can also click through to the read the original blog post containing the song and download music directly from that site. The handy player at the bottom of The Hype Machine's page creates a playlist of all the results on a page so listening to the results is easy. You can also choose favorites to build playlists. Most of the sites in the section are brand new, but Hype Machine has time on its side, having been around since 2005. (Read more)