Chapter Telephone Number
Outgoing calls to the US and Canada are free through 2012. You start the call through their web site, it calls you, then makes the outgoing call.
I don't do Google Voice but have had similar service from a company called Ring Central for several years. I have an toll free number that rings all my various phones (cell, office, home) or my wife's or both. If we still don't answer, it takes a messages and emails and texts us.
I have a similar number recorded as the airport/airport manager's number in the airport master record for our private strip so when one of my neighbors forgets to close his flight plan, several of us get notified.