1. Sorry there's nothing for that.. you'd have to change the stardard of the m3u files so I could save the last song position for it to work -- not a good idea.
2. To make the a confined-expandable video screen you should define an application area (A definition) and clip the same region of the image... Touching the screen should make the controls re-appear.
3- There's no current support for displaying video playlists.. it's not hard to add and I just have to sit down and do it... right now it would prob. display the AUDIO playlist if you tried to do it.