The Major has announced that you can get pets for your Avatar starting tomorrow through the Xbox Live Marketplace.
Each will run you 240 MS Points ($3.00/£2.04/€2.79) and the choices are: Large Dog, Pug Dog, Dog in Bag, Cat, Siamese Cat, Long Haired Cat, Goldfish, Guinea Pig, Monkey, Bird, Snake and a Pony.
We know which one we want. Giddyup.
Some examples can bee seen through here.