Her name is THELMA!
I picked up a new bike rack this week. Saris's new Thelma. It supports two bikes by their wheels and never touches your frame. I've been using this rack now for a week and it is much more stable than my previous rack that attached to the trunk with straps. The bike doesn't bounce, the wheels don't spin, the handlebars don't twist. It's a rock! It grabs the front wheel in a clam-shell with one strap and the rear wheel with another strap. Takes me about 1 minute to put the bike in and less to take it off.
It attaches to your vehicle with a 1 1/4" or 2" trailer hitch and holds 2 bikes. If you already have a hitch, this is a no brainer. A definite must if you have an uber-expensive bike or killer paint because there's no frame contact. It's a bit more dough than a strap mount rack at $250 suggested retail, but when you're sportin' a $10,000 bike what's another hundred?