Items shared in Google Reader....
Simple audio annotations in Google Earth
My Moving Map
My Moving Map is an application for the iPhone that uses GPS to track your location and broadcast it online so that your friends can find you. The position and the routes that you take are broadcast, viewable online on this website and can even be loaded into Google Earth. You can also get directions to your friends from the iPhone simply by selecting them from your address book (provided they are running MyMovingMap too).
User generated metadata in the LibraryThing folksonomy. (Vincent Sterken)
Make your own Cardboard iPhone Dock
Dave Eggers makes his TED Prize wish: Once Upon a School | Video on TED.com