This is still an issue as of 4/11/2012, around 3:00PM.
When calling Google voice number connected to OBI110, it kept on ringing, no answer, until eventually went to voice email. Then in Google voice account, I saw the missed call and voicemail.
I think it started from yesterday. I have 2 Obi1110, in different cities, same issues. One of them has latest firmware (Just updated this or last week)
Calling out are all OK.
I have another Google voice account connected to my Android cellphone with GrooveIP, I can receive and make Google voice calls wit it without problem.
So I think the problem is on the Obi Side.
Anyway to ask Obi to take a look?