So I removed the two feral spirits from my shaman deck and replaced them with death lords and I think they work really well in this deck. In many cases one 2/8 > 2 2/3's and with two flametongues in the deck, the death lord can take a serious beating while removing lots of minions. And most importantly you get to avoid the overload cost of feral spirits, which can so often really screw things up.
Here is the decklist if anyone wants to play shaman, been using this very similar deck for awhile and has always been consistent. If you see a lot of hunters though, hunter has always been a bad matchup for shaman, but this deck can beat anything with the right draw. Just play the control game, but you have potential for huge burst with rockbiters and doomhammer/al'akir.
Shaman - Deckbuilder - HearthPwn
Edit - Ohhh yeeeaahhhh! Obviously you're not going to get reincarnate/sylvanas every game, but when you do man, when you do...