That too is on my list... Only I won't go as far as to make a connection manager out of it like TOR - otherwise epage will be cross
I really wish it could be setup like google voice integration integration on android is. Instead of having a separate button to callout using google voice, you set a global preference (per phone account) that enables / disables google voice calling. Example: If you enable google voice calling for your cell phone account, when you go to call using that account, a post request is sent to google, and the direct dial number is used instead. This could be accomplished by intercepting the outgoing call (like VICaR does, and placing a call to the google voice number instead.