I got to go hands-on with the Lost Shores earlier this week! I've done a preliminary write-up here: http://massively.joy...2s-lost-shores/
I got to see Southsun Cove, the Fractals of the Mists dungeon and 5 of its constituent mini-dungeons, a jumping puzzle, PvP, and I think that's about it. I'd be happy to answer specific questions here or in the comments over at Massively.
Edited by davadude, 15 November 2012 - 07:23 PM.