When were you thinking of going? The annual passport discounts haven't been released yet for 2013. I was trying to book for March 2013 and sent an email to DC, and I get the impression from my return email that they will be releasing some new discounts so advised me to watch emails and passmember site!
If you do not know, if you but a Seaworld, Aquatica or Busch Gardens annual passport for $119 you can get a discount to DC (right now up until Dec 2012) for $69 non dolphin swim and $169 for the swim. That doesn't include any other parks. If you buy it at regular price on DC you get 14 days at SW and Aquatica. So it really is still a good price if you were planning on doing the other parks! That being said, we have been to DC 3 times, once with swims and twice with just resort days, and we find it to be the best day of our vacation! It is super relaxed and a great day!