I read today that Google appears to be going to STOP "Google Voice" and go with a different program, "Talk.....[something]"......IF and When that happens that means we LOSE our phone service thru OBI - right?
You are going to lose GV service through OBi devices from 15 May 2014 irrespective of this rumour. This has been known last last October. http://blog.obihai.com/2013/10/important-message-about-google-voice.html. There are many threads and hundreds of posts about that in these forums.
They're merging google voice features with hangouts, much like they did with google talk, g+ messenger and sms. You'll still have your gv number, and hopefully have the ability to forward calls to it.
But yeah, google voice support for obi ends may 15th anyways.