Integration for Wikipedia. Only shows buildings at select cities.
Go to White House. Check out the -icon in the top right corner. Click it and drag the map around. Use the +/- buttons to zoom in and out, use the downward arrow to open the config page.
Client-side tile rendering makes arbitrarily large zoom levels possible (added July'12) This is using a /Vector tiles approach with OSM buildings data
Current weather on the Azores