Spotify’s radio offerings leave a lot to be desired (read RAIN‘s review of the service here), but one developer has turned Spotify into a Pandora-like radio service called Echofi.
The site opens the Spotify application in the background to play the music, but lets the user rate music within the site itself. Echofi uses The Echo Nest to build a radio station out of a specificed artist (that’s the same service Clear Channel will use to take on Pandora with its updated iHeartRadio service, morehere).
Echofi’s developer has big plans for the service. Wired has more coverage here.