After experimenting with several different ways to get music on my new GN and not wanting to go the Google Music cloud route, I've settled on iSyncr (from the App store). It works with iTunes and syncs whatever playlists you want. Works great on GN! It's not a player, which is fine with me, so I use the pre-loaded Music app, which recognizes the playlists. Copied my entire library in 20 minutes. Since doubleTwist is MIA, this is good alternative.