White metal stacking frame: Do the dryer feet get bolted on to the upper legs of the frame? I'm always paranoid about the dryer slipping/vibrating off the thing.
Launderess: You probably wouldn't use a condenser dryer often in the summer, but it would be nice to have it there for the rest of the year. Would hate to see you have to give up your dishwasher, so stacking seems the logical solution. The blessed event isn't far off; are you getting excited? The AEG sounds like a very interesting washer.