Kotaku today has a good BioShock 2 impressions post up.
***SPOILERS***
There are still many questions to be answered from this preview but the most interesting to me are why you are playing as a Big Daddy and can 2KGames recapture the magic of the first game?
We'll just have to wait until the end of September 2009 when the game debuts. We'll be sure to have a strategy guide and cheats available soon thereafter.