We're looking to go away with our MM voicemail entirely and replace this feature with an speech to text application that can work with a CM 6.0 S8800.
Mutare offers hosted voicemail with integrated voice to text. If you are interested call me at 847-496-9003.
We use the Mutare solution, but you should know that it augments your current Modular Messaging or Aura Messaging system. It does not answer calls for you and simply transcribe the voice and e-mail it to you. It reads the voicemail messages on your messaging server and transcribes the first 30 seconds and e-mails that, along with the original voice message as an attachment.
It works really well and people generally love it. Early on, we had to ask for an F-bomb filter, which was provided very quickly.