More about the contest itself (and not just the blank pony) is better found here:
My Little Pony: News & Events
Don't forget to check back.
Myself? I'll definitely buy a few.. one to keep blank, one to decorate for myself, and one to decorate for the contest. ^-^; Should be awesome. For the record, it says in the contest thing that there are only going to be FOUR (4) winners to this contest, so... ^-^;; Read up more on it, and check back for more news~