Last year I would have said Last, followed by WIIT. I was lucky enough to see WIIT at the Manchester performance. I'd love to see Last live, but I've heard boots of it a few times so I'm not concerned that it isn't surfacing on this tour. Really, for boots, I'd love to see a rendition of Demon Seed. I'm very pleased to hear Meet Your Master a few times.
Assuming the EU tour in '09 happens, I might start yearning for Last in person again
I think it would be really cool to have a live-only song. I guess you could call non-entity and not so lucky now live-only songs. Something totally new thrown in there on the tour would be amazing.