Really? It wouldn't be the first time that Google suddenly decides to shut down a service people used a lot (Reader anyone?).

Ooma is a dedicated phone company with 911 support, Google Voice is just another side project Google can't figure out what to do with. They already announced once that they'd shut down support for the Obihai products, and as far as I can find, there is no offical statement that calls and support will remain in place for good.