This site is designed to help ALA 2010 attendees locate the 18 program sites around DC. The next page is a demo of what it'll look like to use the geolocation service in Washington, DC. It simulates standing on Massachusetts Ave. near the convention center. The real version, located here, will follow you as you walk around. You can try the real version now, but it won't show you much if you're not in DC :)