Actually, it ended up turning out that it would still work.
http://blog.obihai.com/2014/05/the-g...-is-still.html
http://blog.obihai.com/2014/09/googl...ai-update.html
http://techcrunch.com/2014/09/10/goo...ee-voip-calls/
And of course, they are not the only service out there, and having a generic VOIP tunnel means if GV ended, you could easily switch over to something else.