Can Google's Voice Actions be started by voice? I love Google's Voice Actions! It lets me listen to a song of my choice by simply saying "Listen to &lt;song name&gt;".

Problem is... I can't find any way to start Voice Actions itself by voice. I must touch the screen in order to start it.

So, my question is two-fold:


Is there a way to start Voice Actions by voice? (or without having
to touch the screen)
If there isn't, what kind of a solution or workaround can you suggest
for a blind person?


For example, some phones have only one tactile button (other than the power button, of course) -- the trackball. Is it possible to set that trackball to start Voice Actions when pressed long enough?
if your phone has hard keys you can start void by holding down the search key (don't have to touch the screen).