Photosynth most likely is not unknown to you (mentioned it quite a few times already), but the first part of the demo on Seadragon might have been. Damn impressive demo! Think of the new marketing aspects when using Seadragon to read a newspaper (which is demonstrated)
Seadragon and Photosynth Demo
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wow, first time i am happy that we have pc’s at work. that demo on ted.com was really impressing. weird that there is no such thing on os x yet though. (pronounce weird like damnit!)