When will Google Voice become open to the public?

GrandCentral became Google Voice a little while ago. I tried signing myself up for GrandCentral invitations before it turned into Google Voice, and then I tried signing up for it again once it became Google Voice. I heard it's going to be open to the public soon, but I can't find any hard information on this. I really want to join!|||I know this is not an answer but I have had the exact same issue. I do not think anyone knows the exact release date yet... Hopefully soon!