leslieh - It is great to hear your pleasant experience at the park in Williamsburg. The in park discounts they offered are better than my season pass discount of 10%. Glad to see how AB is handling this offer.
tonilea - an id card should be fine. I would call the park just to make sure. They should have plenty of experience with this program by now.
As far as Disney goes, they need to offer discounts to get people in the parks. Busch Entertainment has said to the local media here, that there has been no drop in attendance and has been no need to cut jobs at Busch Gardens in Tampa. I trully believe if Disney offers a similar deal as AB, that they would still profit from the increase spending in their parks that these people would bring. Now is not the time to be stingy with discounts. Get people in the parks even though they might only be paying $30 instead of $50. They make nothing and have to cut employees when people don't visit at all. There are several ways to obtain a discount to Busch Gardens for one day, something I have not seen Disney offer even to Florida residents or AAA members.