Update on BAMZOOKi, Ian Saunter, Development Director of the BAMZOOKi technology at Gameware Development, posted a comment a couple weeks ago with some interesting info and links on the show so I decided to re-post here.
"Not quite blue screen, but a system developed by the BBC called 'Free-D'. It enables the kids to see their Zooks on that table in front of them (as a 2D projection) whilst the cameras (and their operators) are viewing a real-time composite of the action fed to them via PCs rendering the scene from that camera's relative position in the studio. You can find out more t http://en.wikipedia.org/wiki/BAMZOOKi and there's a nice promo video on Youtube too (at http://www.youtube.com/watch?v=nau11dK4Eds&search=augmented%20reality).
Cheers
Ian (at Gameware)"