Recently, players from the Emberstorm and Whirlwind groups have been noticing that they're being grouped in the dungeon finder with each other. This isn't a bug; the matchmaking system has been changed to allow those two battlegroups to be matched into dungeons and BGs with each other as part of the overall goal to eventually merge all battlegroups across a geographical area (think Europe or North America) and allow matchmaking across all of them.
CM Lylirra announced these changes and addressed some bugs to the process that are making it impossible to queue for BGs, which will hopefully be straightened out. Still, bugs aside, the first step of eventually allowing an entire region to be selected from for PvP and PvE seems really exciting to me and very positive overall. Finally, I'll get to farm all the disparate old friends I have on like 20 servers! A frabjous day, all told.
World of Warcraft: Cataclysm will destroy Azeroth as we know it; nothing will be the same! In WoW Insider's Guide to Cataclysm, you can find out everything you need to know about WoW's third expansion (available Dec. 7, 2010), from brand new races to revamped quests and zones. Visit our Cataclysm news category for the most recent posts having to do with the Cataclysm expansion.