Blizzard released a preview today, highlighting some of the UI improvements coming with the 3.1 patch. Included are the UI for dual talent specs, equipment set management, a new objective tracker, and an updated LFG interface.

See the preview here (http://www.worldofwarcraft.com/info/underdev/ui.html).

it looks great so i just wish they would hurry up and implement it on the live servers !