By looking at Blue Trackers collection for today i found this (tabbed as blue today, that is a blizz poster have tabbed the post in a official forum)
http://blue.cardplace.com/newcache/en/123012615.htm (http://blue.cardplace.com/newcache/en/123012615.htm)
I also sugest looking through the posts at this site regular to find hint, information about what is coming (hunter pets will get more abilities) and other useful info. :)
Just a quick heads up for everyone intending to go to Karazhan (and probably the other 10+ content zones):
There is a reason Blizzard has made so much +Stamina gear drop in TBC.
Make sure you use it! For example the very first boss in Karazhan (Attumen) can random charge any member and if you are wearing cloth it will hit you for about 8k damage. If you are a clothie and wearing your nice 'stats' gear but as a result standing there with a mere 6.5k hp then it's over for you.
Additionally, with current gear levels you should expect to have to bring mana pots and health pots. Attumen used at least a couple of mana pots per mana user and the priests also both had innervates, food buffs and top level mana oil. I personally used 2 mana pots, 3 mana stones and an evo during the Attumen fight.
TL.