Cataclysm will be selling a wide variety of items, including pets and mounts!
The guild vendors on both the Alliance side and the Horde side carry a Baby Dark Phoenix and a Snail Pet (screenshot). Both appear to be very inexpensive at this stage of the beta. I've always wanted a snail for a pet and a "dark" phoenix sounds sweet! Cataclysm is sounding better everyday.
New Dark Phoenix and Snail Pet
August 14, 2010