I think the client code ends up looking very nice.

        r.text_input_with_callback(proc {}) do |r2, text|
        if text.length > 1
            r2.div_named 'bar', `grep -i \"^#{text}\" /usr/share/dict/words`.gsub("\n", "<br/>")
                end
        end

You can see it in action here. I’ll post the code to the Borges mailing list, but it seems pretty dead lately.

I think this idea can pushed much further. I’ll get back to you with anything else I come up with on this front, but you have to promise to do the same.