I've been as far as the first boss in HSH.  It's not too bad but we did have a nice group.  Mage, rogue, prot warrior, ret paly(low HP so he got 1 shotted when he grabbed aggro) and me, resto shaman.  Guess the key for us was steady dps and 2 cc's.  The warrior tanked 2 quite often and it wasn't...