"The new version of Ubiquity is 0.1.5. It's a quick
download, and you can get started experimenting with commands right
away by hitting Ctrl-Space to bring Ubiquity up. In the screenshot
below, I've started to type in the command "e-mail" because I want
to e-mail a web page to somebody, but as you can see, I
automatically have access to lots of other commands, including
turning the page into a PDF that I can send. This works very much
like the Awesome Bar, which will begins to understand the name of a
web page you're looking to go to before you type in the full
name."