while searching for the fabled new google Car Home/dock app, I stumbled across a relatively new app called Car Home.
It is still in beta, but man is it sweet. Not only does it have 18 customizable buttons (with supposed direct dial), but it also has some kickass functions on the left side. On the top-left, it shows the speed. Middle-left, your direction (with degrees?), and on the bottom-left, your gps-enabled weather (WITH PRESS TO SPEECH!).
It also lets you know where you are street-wise on a bar at the top, with some random updates on road changes and upcoming streets if you want them (i think, i havent played with it to much).
and no, I am not the creator. i just like the app.