I'll take a look at Telephone and see if its applescriptable (not all apps are)...
In the meantime, if you use telephone to use Google Voice, I've already written QS actions for Google Voice dialing and SMSing: The post is here: http://tr.im/Ehou make sure you get the most recent download (I uploaded a few versions of it as it developed.) which is also here: http://tr.im/BUn0
