There must be some synchronicity in the air or something. I was talking about Pandora a few days ago. Today, I was web surfing and checked in at Doonesbury.com to catch up on all the comics I'd missed the last couple of weeks. There in the Doonesburys for November 27 and November 28 was a soldier talking about making battle mix tapes from Pandora playlists. To get the gist of what's going on, you have to go back to the beginning of the series of comics.
Toggle touches on an important point about Pandora. Sometimes it goes all random on you and spits out something completely off the wall, but if you use it often and give it a lot of feedback, the randomness goes way down.
One more thing about Pandora before moving on to other topics: I was checking it out after I blogged about it and found a page of Christmas music stations. If you're into that sort of thing, you're the sort of person that's into that sort of thing.