You can map keywords or you can simply enter a URL. To get this map (and to watch it grow in front of my eyes), I entered servantofchaos.typepad.com.
Not only do you get a funky looking map that shows the sites linking to you (and the sites that link to them), you get a great long list with short descriptions. To do this, TouchGraph calls on the Google search database. BUT ... this is not all TouchGraph does. It also works for Facebook -- and links to your friends, shows their networks and their photos.