(Sorry for not just editing my own previous post)....
A crazy ide just struck me... Would it be possible to make a frontend application with PHP?
I think it would. And with the use of HTML/CSS, the skin can be just the way you want it to be.
GPS Logger with PHP, possible
Audio/Video player/controller with PHP, possible
Audio streaming, Most defenetly possible

Phone interaction, dunno....
Think I will experiment a little with this...
As long as I can get php to talk with my IBUS controller, this could be what I want to do... Just because I can, not because it's practicall...
A system like this, could run on every possible OS that supports a webserver, php and sql. It would be scalable, since one could build new modules, and GUI can be "shipped" standard, or left to the user to custom build the GUI as they want it.
It might be a bit slower than other front end system available...
scrapp??? or a good idea?