pretty much on the nose.
Alpine almost got it right with the iXA-W404.
But if you can't use the apps -- what's the use. However, the calculator app looks like it means more than it does now.
I also noticed the (errr, it was just posted all over this place) new iphone breakout set. Nice ... but still lacks in so many ways.
As much as I love my iphone ... I wonder if mp3.com just shouldn't get together with a cell phone maker and ;-) ;-) ;-) make the system that would solve the Apple problem.
So, I'd start with a droid phone, get google backing, and then partner with lilliput or some other Chinese/Korea manufacturer that would build the Alpine like head unit that would hold the 7" monitor and inner amps and pc like dock to power the rest of stereo components.
But then again ... most people here would probably rather hack it together. mp3car seems more likely to follow up on my idea (or probably has been waiting for the momentum to start off ) and of course they'd want to build off the community's input and ideas.