In pet battles, tradable pets can be sold on the AH. Training and caging wild pets looked to be a lucrative endeavor, since the catchable pets spawn in various qualities such as poor and rare. Many buyers would have been happy to shell out their gold for a high-quality pet that they didn't have to grind for.
As of right now on the beta, pet spawning locations tend to be heavily camped. It will be interesting to see how this plays out in cross-realm zones.
It's open warfare between Alliance and Horde in Mists of Pandaria, World of Warcraft's next expansion. Jump into five new levels with new talents and class mechanics, try the new monk class, and create a pandaren character to ally with either Horde or Alliance. Look for expansion basics in our Mists FAQ, or dig into our spring press event coverage for more details!