In dash table install?

[Trogdor]

So, I had this thought. I want to install my Asus transformer in to the dash of my Evo! I basically never use the actual radio, and if I did ever want to, it's not like I couldn't just use the tablet to do that.

That leaves me with a few questions.
1) Does anyone know of a way that I could get my HTC Evo 4g LTE (I'm on Sprint if that matters) to do free wi-fi tethering?
2) Can I wire the tablet to the car so that it comes on when I start the car?

Obviously there will be some kind of modal for the steering wheel audio controls to work, and some conversion of power.