If you are a GrandCentral user, you can upgrade to Google voice now. Sign in your GrandCentral account you will be prompted to upgrade to Google Voice using your Gmail account password. After you upgrade to google voice, all your Gmail, igoogle, Picasa web Album, etc will be at the same place.

Comparing with GrandCentral, Google voice now has SMS,  Voicemail  transcript,  Conference  calling  and  low  priced  international  calling. If you don’t have GrandCentral before, leave your e-mail and you will receive an invitation when it becomes available.

 

Related:

How to use Google Voice to send and receive free SMS

How to make international calls using Google voice

Related posts:

1. How to get google voice
2. How to use Google voice to send and receive free SMS
3. How to make international calls using Google voice?