@alexis, can you do a mockup? I still havent started to this so still open to ideas about how it could be done.
My current thinking is along the lines of Zune without the library navigation part - just the now playing list and associated lyrics, artwork, wavebar/ visualiser etc
This an idea of what I was thinking you may be doing.. where it has wings that can be expanded/collapsed (They are expanded in your mockup) .
Please disregard the obvious signs of a novice. This is much the result of cut and paste.
The song title and the progressbar could actually be combined
The player controls row could be a whole lot thinner.
I am anticipating the Transparency aspect to remain functional.
The black labels on the side.. you click on those and the relevant feature would expand out or pop up if desired.
The spectrum analyzer could overlap the bottom of the artist image or something like that. If an artist has no image, there could be some sort of visualization in its place or just a default image.
They are not lazy... just more efficient.