On Tuesday Blizzard rolled out the first major content patch for World of Warcraft
since the launch of Wrath of the Lich King
last November. The 3.1 patch includes the long-awaited dual-specialization feature
, which allows players to quickly and easily switch from one set of talent choices to another. Action bars and glyph choices change as well. The patch also includes a new end-game raid dungeon, Ulduar, which expands upon the variable difficulty modes Blizzard has recently experimented with. The instance contains 14 bosses
, 10 of which have an optional "hard mode" that players can attempt for better rewards. In addition, the patch contains a host of class balance changes, bug fixes, and UI improvements. You can see the full patch notes
at Blizzard's website, and a brief trailer
is also available.