Here's an insightful and rather good approach (at least to me when I tried to implement something along the lines of this): http://engineering.linkedin.com/linkedin-ipad-5-techniques-s...

Why can't they just load when you reach the end? I've found this tends to be what happens for me, anyway.

They could do that, but they don't want to. Their point is that web technologies can't deliver the experience they want. Telling them they want dumb things is not a legitimate response, especially as they can get the experience they want using other technology.