In case you all were not aware, Mountain Dew has been running a WoW promotion. Part of this promotion is an in-game little robot pet that “fuels” up and will burst into action if it is around other pets that have “fueled” up in the opposing factions color. You do not have to purchase anything to obtain the pet, just sign up on the site (you should be directed to the official site by clicking the picture above), and then click the link to obtain your pet. As far as I am aware, you can still sign up for this promotion and obtain the pet. The pet will be sent to you in your in-game mailbox.
I only mention it now so that if you are collecting pets, you do not miss out on this limited time dealio. Having registered awhile ago, I intend to collect mine when I get home from work this evening =)