Not many details, as you need an account to get more information, but the service is now operational. I'd imagine your voicemails would get sent to you via email? They're calling it Vonage Text, & it looks like it might be text messages in addition to emails.

"It would explain why a hosted PBX company like M5 has recently started offering voicemail transcription as well. Perhaps this signals Vonage pushing more into the SMB space and leaving some of the consumer marketing behind?"