Time - I've purchased an igepv2 embedded Linux board. I'm having a real devil of a time getting Ubuntu on it because I'm Linux-stupid. I'll figure it out some day but not today.
After that, I thought that Sama's Velocity FE would be a good core to put web page skins on. At first, I want to simply get it to run on the igepv2 in the car and serve the pages up to the iPad that way. Later, it can move off the car and onto the net if I want.
I don't really know how all these bits and pieces tie together, so it's going to be a long uphill climb to ever get it working. I just thought that either Velocity or this project are headed in the right direction for a connected car install.