The other day I was looking for some slick carpets for a design. Rather then make my own, I searched the 3D warehouse and came across this collection of Design Within Reach carpets.
These are very well modeled carpets that work great in Sketchup. Best of all they are embedded with extra "smarts" so they can be resized. Just drop on in your model, right click it, and select "Dynamic Components" and then "Options"
To find these, just open the 3D Warehouse in Sketchup and search for "Design Within Reach rug"