Google Voice apps available for Android, BlackBerry
Naturally, with Google Voice for mobile, you can call and send text messages from your Google Voice number. The application also provides voicemail transcriptions and cheap international dialing (starting at $0.02 per minute).
If you have a BlackBerry, visit m.google.com/voice on your smartphone to use Google Voice. Android phone owners can find the Google Voice app through Android Market.
A video presentation of Google Voice for mobile can be watched below:
iPhone owners will also get a Google Voice app, but it’s not clear yet when this will be launched.
Via the Google Mobile Blog