Okay, it's not ready for prime time. But it was entertaining digging into OpenSocial and making some gadgets for the Orkut sandbox. The ability to write arbitrary data easily to a feed stream from the client side is going to be very handy.
Now I just want someone to explain to me why there are already several projects on Rubyforge that claim to be Rails OpenSocial projects. Someone should just port from Shindig after it's ready.