SimulScribe converts your voicemail messages into text. "We deliver your transcribed voicemail, along with the original audio, to your mobile phone, PDA, and/or email account."
The site also has:
Benefits
Read voicemail on your mobile phone, portable device and/or e-mail
Whether you are in a meeting, traveling, or on the golf course, you can instantly see who called, what they said, and you won't have to listen to all of your messages to find out about an important missed call
Use the SimulScribe online user interface to search, sort, archive and delete voicemail like email
You won't have to write down the information from a voicemail; important numbers, names and addresses are easy to find, easy to access and will never get lost
Respond in text or forward the message to another person
Delivering voicemails as text when you are roaming saves you money
If a message is inaudible, you can still listen to the message as an audio file that is sent direct to your e-mail or dial in to the voicemail system
Keep the same voicemail functionality that you are used to; all dial-in voicemail functionality stays the same.
I'm using it. It's worth the $10 a month.