I had an idea for a front end. I'll write what I think would be a good idea.
Front end for iTunes
Front end for Quicktime
Front end for DVD player.
Front end for RadioShark
With F11 or which ever button it is that shows all open windows and lets you click one to bring it into view, all the different apps would be there in front of you. Simply click one and you're off.
An extended idea of that would be to have the iTunes, QT, DVD player and RadioShark front ends on their own audio output. Maybe an external Firewire/USB soundcard with 4+ stereo outputs would mean the audio from each app could be routed to a separate output meaning the audio could be easily switchable externaly from the Mac. It would also mean that you could leave the audio running in all apps and would mean that one button press and you'll be listening to the radio or switch back to iTunes when a bad sings come one etc without having to mess around with the screen.
The major thing would be finding a multiple audio output product and a finding a way of routing the audio in the Mac.
I think the above would be a good project to impliment into an existing front end or a new one. It would also make it safer to switch between apps on the move!
Anyone think it looks interesting?