And the 2010 tour was announced today, so no worries about last one ever. Knowing that they have at least one more album already completed, I don't expect them to stop any time soon. However, they have to do something pretty spectacular if they want to out-do themselves with the stage again!
And (electronic) sign people, I can't believe none of you have been drooling or gushing over this! Saw the show in Chicago, what an incredible feat of engineering, design and build. More on this here (and many other places, but figured I'd plug a sign related site): http://www.digitalsignageuniverse.com/