Hi there. I haven't been on these forums for some time now, but I thought I would check in to see how the mac FE world is doing.
Out of all the FE's I have seen or tried this by far shows the most promise (no cut intended toward any other hard working programmers

). Here are my thoughts if you don't mind my input.
1) Skins - Cool, but I could really care less. It would be a nice bonus though.
2) iTunes - I know that many people hate the iTunes playlist system, but I for one like it. I can find my songs pretty quickly. What about just 2 buttons? Title and Artist? Depending on which one you press that's the list you get. Being able to access my iTunes library would really be nice. I use iTunes for all of my music. Creating .mp3's of all of my music would really suck. Music purchased through the iTunes music store can't just be dragged out of iTunes to create .mp3's. They are in those stupid .m4p files.
3) iPod - I don't have one, but if your app progresses to become a major contender you probably should consider planning on adding this feature.
4) GUI - It looks real good to me. I prefer the brushed metal of the OS.
5) Video - A simple button set up like your audio player would be just fine as long as it has all of the "regular" video controls. Choosing between a movie file and a DVD would be very important.
I have put off buying a screen and a mac mini because of the lack of a working front end. Please keep up the good work and give me an excuse to go out and buy them. I would consider making periodic donations as you continue your development.
Cheers!
LM