I have the Solvit Deluxe Pet Booster Seat from Amazon.com. Prince is able to see out the window and I believe it helped with his car sickness. He's tethered so that keeps him out of my lap while I'm driving.
When someone is riding in the passenger seat I turn the booster seat around so he's facing backward. The only problem is that he believes the front seat is his so when someone is sitting in the passenger seat he whines. Spoiled puppy!
http://www.yorkietalk.com/forums/att...112568&postid=