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BlastMyMusic has launched a Facebook application called MusicBlaster, and is among the first to let you sell your music through your Facebook account. This works just like your BlastMyMusic account, and you'll need to return to the main site in order to set up your music store, etc. From there, the store widget can be added to your Facebook profile. The good thing is that it's promoted with that extra umph thanks to Facebook's network, and constant feeds updates.