I have had my Google Voice account for several months now and really enjoy its web based user interface.
When I receive voice mails in my Google Voice account, notices are also automatically sent to my Gmail account.
Accompanying each Google Voice email is a voice to text translation of the message in addition to the actual message.
Voicemail messages can also be downloaded to a computer through the “More” menu within the Google Voice dashboard.
The Google Voice message files are exported as MP3 files which in turn can then be imported into applications like iTunes for playback.