Home Decorator will allow you to photograph a room and paint solid walls and objects with a single touch.
Includes many tools such as color pallets, suggested colors and a leveler.
Also includes "Get Color From Photo" which pulls colors from any photo, including a paint swatch or material so you can test the color before putting a drop of paint on the wall!

The pro version contains more sophisticated color logic, email and facebook functionality and more colors. It also contains a leveler.