Considering that we like having control of our own vacations - we hate being part of tours, dragged around on someone else's schedule - and that we don't have kids to concern ourselves with, I can't see us ever using Adventures by Disney. Cash or points, forget it.
Also: Giving up 500 points to do an ABD means giving up 500 points that can be used for up to 5 weeks of vacation elsewhere.
We might use the Concierge Collection one day, we do use the Disney Collection and we're going to use the World Passport Collection in 2010. ABD - not a chance.