My wife and I love digital. Just before DD#1 was born, we got a Canon digital Elph, a point and shoot, and have taken ~3,000 - 4,000 pictures since then (and since the birth of DD#2 10 months ago).
But, right before our last trip to WDW, we got the new Canon Rebel XT (EOS 350D), an 8 megapixel SLR, along with a nice 28-135 mm telephoto lens with image stabilization. At first we were VERY worried about its size and weight (the lens' nickname is Mongo). But, after shooting some low-light shots, we've been converted. We took 810 pictures during our 1 week stay.
With digital, as mentioned earlier in this thread, you can shoot hundreds of pictures, preview them to keep just the 'good ones', and not pay to get prints / slides of the failures.
So, why not get a digital SLR? The lower cost of not needing to deal with film processing, with the flexibility of using your choice of telephoto lenses?
In another thread, I
posted a few pictures I took with the Canon Rebel XT.