Firefox Ubiquity plugin

A new experimental open source plugin for Firefox from Aza Raskin is designed to connect the human language and the network.
Even difficult to explain. Watch better videos:

And here you can download ubiquity-0.1.xpi
Manual for use

From myself I want to add. Since I use quicksilver on a Mac, I really liked this plugin. The hot key invokes the menu and simply types the text, command or search query, and it immediately searches Google. In second place is looking on Wikipedia. I advise you to try.