In the new MySB remote control web page, I can see my MP3Tunes playlists and albums and artists, but clicking "Play" on any of them doesn't work.  Individual songs work, but not those multi-song objects.

Looking at the "now playing" list in iPeng, it looks like MySB adds a single item to the now-playing list matching the name of the album/artist/playlist, instead of adding its contents.  Nothing is ever played, and the player remote acts like it's all done playing (i.e., it shows a Play button vs. a Pause button); and if you press the Play button it changes to Pause for about a second and then cycles back to the Play button.