We don't have any deployments yet but we see active interest from existing customers. We believe that the servers (PCRF, OCS etc) will move to the cloud first.
We see operators doing POCs but as far as I know, there are no live deployments yet. POCs under ETSI's NFV initiative are interesting. But managing the VM and the cloud infrastructure is a challenge, and I think deployments will start with some point solutions and custom integration with OSS.