The new lock doing the posting in the weekly "blood pact" column seems to be very knowledgeable and very good at communicating in understandable terms. I recommend it for all aspiring locks (the last one seemed more indulgent in personal preferences than objective analysis)
This weeks column which can be read here http://www.wow.com/2009/11/16/blood-pact-patch-3-3-raid-build-roundup/#continued (http://www.wow.com/2009/11/16/blood-pact-patch-3-3-raid-build-roundup/#continued) is a nice write up on what specs will be good for 3.3.
As usual the demo spec is slightly less personal dps but great for overall raid dps (though our raids are melee heavy, so it would be a limited raid dps boost). Affliction is the top spec once again with destro slightly behind. Pet useage with specific specs has changed again as well, with the fel pup being the pet of choice for affliction.
Overall a nice article