Had anyone ever used this service? It seems really cool. I added a song instantly from Rhapsody, then took 9 seconds to drag that song into my Zen. Seems pretty damn nifty, considering I can get the 14-day free trial, and get a good 400 songs into my Zen in that time. My only question is... is there any way the songs added to my Zen will stop working after a set time limit?