Teacup.
http://img95.echo.cx/img95/9816/cup8az.gif
Yorkie.
http://img95.echo.cx/img95/1049/fredp3yq.gif 
When I first got to YorkieTalk, I thought the same thing. "Aww, those teacup Yorkies are just so darn cute!" Then, before I got Fred I decided to do my research and found this forum! (Thank goodness)
Pretty much in a nutshell, I learned there are no such things as "teacups", "rare" (I've seen some more ridiculous ones, too) or anything else that strays from "toy", "tiny" or "runt". It's just a hype and some sort of marketing scheme that irreputable breeders do to get an extra penny or two. I also learned something else to lighten my naivety when looking for a dog. The smaller the dog, the more potential healthy problems you may face.
As for Shampoo, I ordered the shampoo that Khristine (Yorkie_Girl) referred to and it smells guh-reat! I forgot what it was called though, lol.