Steal this!
Pandora needs to allow their channels to be shared. Not variations of the channel, but actual channels. I can't tell you how excited I get after I create a kick ass station, and want to share it with people. Set a relatively low price point, base it upon either legnth of all songs, or the number. It would totally replace the lover's mix tape! Send a link to the Pandora station, they can listen to it for an undetermined amount of time ... I mean wow, pardon the pun but way to open Pandora's box!
Food for thought ... there are so many places I could take that ... ARGH!