The recently-posted Control Exposé via AppleScript and voice hint reminded me of a hint I posted in the Mac OS X Hints Forums. You do not need an AppleScript application running, just get Speakable Items to do what you want with your own words. You can also use small scripts placed in the Speakable Items folder -- ~/Library/Speech/Speakable Items.
Here's an example: I want to say the word Widgets, and have the Dashboard show (or hide if it's showing). To do this, I make an AppleScript with this code:
on run
try
tell application "System Events" to key code 111 --F12
end try
end run
Save the script in the Speakable Items folder with the name Widgets, and with the extension hidden. Now when you have Speakable Items enabled (I have mine set to listen continuously) and say the word Widgets, the Dashboard will show or hide. You enable/disable Speakable Items in the Speech System Preferences panel.
Mac OS X Hints
http://hints.macworld.com/article.php?story=20060724111631837