
Edge: Within Blizzard, every game has a codename. Diablo was known internally as Hydra. StarCraft II was Medusa. World Of Warcraft: Wrath Of The Lich King didn’t get anything as dramatic. Wrath Of The Lich King was known as WOW Expansion 3. On December 7, Blizzard launches the follow up: WOW Expansion 4, now known to the world as Cataclysm.
Cataclysm is a well-thought-out, well- planned, well-presented disaster. It uses the geologically violent return of a long-awaited dragon to rip apart the continents of Kalimdor and the Eastern Kingdoms, and rebuild them from scratch. Cities are remodelled, rivers diverted, zones re-quested. And it’s the best thing that could ever happen to the world’s most successful game. Why did Blizzard decide to destroy the world? How did it reach this point? And what does it mean that more than 12 million players are delighted to see their home from home torn apart?

Apparently Cataclysm won't be the last expansion for World of Warcraft and a blue commented on the number of changes in Patch 4.3.
seriously, I'm sure they'll make another one or more after this as well. WoW is still a HUGE cash cow
Blizz hinted years ago that they have a few more expansion ideas lined up which would eventually take the level cap to 100 and beyond. Given that Cataclysm only raised the cap by 5, and the new expansion does the same, we can assume that there will be at least 2 more expansions.
Pixie brings us a how-to on obtaining your own giant ridable Seahorse in World of Warcraft.

Barugaara brings us a guide on how to gear your resto Druid for heroics in World of Warcraft: Cataclysm.