This is for all the PVP'ers in the Cataclysm and Frenzy battlegroups, as announced by Drysc today...

To continue providing the best possible game-play experience in World of Warcraft, we will be joining the Cataclysm and Frenzy battlegroups sometime within the next month. You can view the list of realms that make up these battlegroups here. By bringing all of these realms together into a single battlegroup, we hope to lower queue times and increase the number and variety of opponents for those participating in cross-realm battlegrounds and arenas. We'll provide further information as we get closer to rolling out this process.