Blizzard's best efforts (they lasted pretty long this time!), the Friends and Family Alpha client of the upcoming World of Warcraft: Cataclysm expansion has leaked out into the world, and the forum denizens over at MMO Champion are busy digging through it for all kinds of spoilers. They've uncovered maps and screenshots for both revamped Old Azeroth zones and the new high-level dungeons, as well as pictures of the new Goblin and Worgen starting areas. Additionally, they've got information on new achievements and abilities, and the completely revamped class talent calculator now active in the alpha.
Keep in mind that, as closed alpha information, none of this is official, and most of the stats are likely to change before the expansion actually releases later this year. All of this information would have come out soon anyway, as Blizzard is planning an open beta on this expansion soon (things are a little busy right now with some other testing), and is slowly releasing information officially as well. But if you want to gorge yourself on spoilers before dinner starts, head on over and feast, my children, feast!