[TeMPOraL]

You still need to use the mouse. One of the biggest benefits of Vi(m)/Emacs over everything else out there is that you don't need to use mouse for anything. For example, to justify a paragraph in Emacs I highlight it (several quick ways to do it with keyboard) and press C-u M-q. And you can do the general "replace text by running a shell command over it" by highlighting the text, and doing C-u M-| [shell-command-here].

The feature you're describing is awesome and useful, but I wouldn't be happy to have to use mouse for it. Is there a way to invoke it from keyboard in Acme?