I recently did a Sketchup model of our space, and it works wonderfully for giving exhibitors good ideas of where they'll be and what their work will look like in the space (roughly). The only problem is, unless they use Sketchup themselves, I can only send them static perspectives on the space. I also know of some galleries and museums using 2nd Life to model their space in such a way that can be explored in 3-D "realtime" by using an avatar to roam the corridors.

BEN