This model was originally sculpted by Carol Williams. You can see more of her work at her website: http://www.riorondo.com.
The Weanling mold was finished in 2002, and as you can see, on many of the models today, that original date is still marked underneath the back legs. The first edition model was called Paars Dream Doll in 2002. You can see more pictures here: http://www.stonehorseref.com/Horseinfo.aspx?HorseID=374.