Thanks for the beta. I've been playing with the mediaPlayer, have some feedback:

1) volume control is too complicated as others indicated
2) Mute button on top of the Pearl only works when mediaPlayer is in the foreground
3) I had to tweak a few times for the shuffle setting to stick
4) no quick way to scroll through the playlist section (middle part of the player screen showing list of songs in the playlist). If your screen is showing songs begin with letter W, and you are looking for a song starting with letter F, and you've got a 2GB card filled with songs, and on a playlist that contains all songs, you got a long way to go. Anyway to make that easier, like if user hit a letter while going through the list, it jumps to that letter?