I gave Meguiar's Ultimate Wash & Wax a try this weekend, and was surprised that it really works! My old 1973 Previa's paint is scratched, dinged and sun damaged, but after washing my 2010 Venza, I decided to use the left-over suds to wash the Previa.
I gave it a quick once over and then rinsed it, but just let it air-dry. Later I noticed how shiny it looked. My Venza looks good too. This stuff adds depth to the finish without my having to do any other waxing.
Sorry to sound like a commercial, but I'm stoked about this stuff.