The application adds new functionality to your existing iPhone Visual Voicemail. Instead of only being able to listen to your voicemails on your phone, you can now share those iportant messages with a single click.
Voicemail Forwarder gives you a new button that fires up an email with the current voicemail attached to it. You can then send the email as normal to any recipient.
The application costs $2.99. You can find instructions on how to purchase a Cydia application here.