The scrolling seems a little jerky to me, but that would probably be a good thing once we're dealing with a populated playlist. I like the responsiveness of the seekbar.

On rotation, I would also prefer to have it configurable. One thing FBReader does well is allow fine control of rotation; you can choose to rotate to any one orientation or through all four in the settings. I'd like something similar here if possible, or at least for it to open at the last used orientation.

Are the forward and back buttons going to be for fast forward/reverse or next/previous selection? Or both?