You heard that right, World of Warcraft just got an in-game (pet) store. The new store is selling two new pets: the Pandaren Monk Charity Pet, and the Lil' K.T., mini-Lich pet. Both pets will sell for $10 a pop, with 50% of the Pandaren Monk's proceeds (for Pandaren Monks sold between now and the end of the year) going to the Make-a-Wish foundation.
It's important to note that these pets are strictly vanity pets and serve no combat function whatsoever.
For additional information on the new service, check out the Pet Store FAQ.