Please allow a shameless plug for a friend of mine whose has started a company selling great handmade high quality design rugs. These rugs are great for any room in the home and for a child's room as well. Handmade in Chile and of the best quality wool you could want.
If you want something stylish and one of a kind that no one else will have check out her site.
We of course bought one for my son's room and everyone loves it when they come over.
I would definitely get one for our daughters room whenever we move to a 3 BR!