About Visual Voice Mail.

This is one of my favorite features - the only challenges is I want it to be client based - eg the voice files live on the device itself. I used to use a service called callwave which would send them to you as an MMS or Email, with a voice transcript, caller info in the subject field (with the file attached). then i could listen to it at my leisure w/ or w/o a signal, and not have to wait for it to load ota.

Does anyone know if this service exists? I have searched on google and this site.