I've just watched a video on Ubiquity from Mozilla labs. Wow, looks great. Must try it out. You need to see the video to really get an idea of what it is all about, but it bring shortcuts into your browser to connect together different parts of the web to make life easier.
Select a name or address and type "map" within the browser, it places the location on a map! It also interacts with other services such as mail and calendar applications.