You may recall a few days back that we told you about new stable slots coming with Wrath of the Lich King. It looks like Blizzard wasn't just whistling dixie, because they're in. When I was switching from my level 65 devilsaur to my beefier level 70 dire raven for a Nexus run over on the Beta server, I noticed that the stable boy was offering me two more stable slots!
The stables slots costs 50 gold for the third one, and 150 gold for the fourth one, giving you a total of 4 slots. This means you have room for one pet from each talent tree, plus a spot for a specialized pet (such as a scorpid for PvP) or an exotic pet (and yes, devilsaurs will be exotic only) or two.
Combine this with the abolishing of the need to tame pets simply to learn skills and auto leveling, and it continues to look like pet management should be easier, funner, and more efficient in Wrath.