What is interesting right now is that the reward per block has reached the max that is set in the code (100 YAC per block). If the difficulty drops 100 fold, the block rewards will not change, unlike what has occurred up to this point at each NFactor change.
As an update; according to the pool and wallet statistics it appears the block reward has fallen to 95 coins per block (and is still dropping). Looks like there is some serious mining power being added to cause this increase in block difficultly!