If you’re a retailer running a home-grown e-commerce stack, your engineers will enjoy and benefit from Cal Henderson’s “Building Scalable Web Sites”.
Back from TED in March: Blaise Aguera y Arcas’ PhotoSynth demo. Stunning technology from Microsoft Live Labs for building 3D models of the world from collections of regular snapshots.
If your own IT wizards are responsible for the care and feeding of your web app databases, I highly recommend this series of fascinating posts on database strategy put up by O’Reilly last spring. Tim O’Rielly interviewed prominent web sites on the nuts and bolts of their database approaches.
Jawed Karim speaks on the origins of YouTube and on the history of web killer apps.