http://videos.dld-conference.com/
(((If you've never seen Norman Foster speak, you should have a look at Monday afternoon on the video archive here. This gentleman is likely the world's greatest living architect. Even better, it's a rather warm, humane, English-as-a-second-language-friendly presentation where the graphics are artfully chosen and they all work correctly.)))
(((I can also recommend the Luc Besson presentation where Luc is waxing all temperamental, Euro-artsy and directorial. Luc's really on top of his cinematic schtick here.)))