Invitations to Google Voice are already available to students.

Do you study in one of the American educational institutions? Or have friends "there"?
Google distributes invitations to Google Voice to all students who have mail in the .edu domain
Details
According to information from androidandme.com from May 14, Google Voice service has become available to students and can be used on Android phones.
Subscribe to the service can be on the link .
What does the service give?
- It is possible to choose a number when you first enter the service, the number will be used to receive calls and send messages;
- Voice recognition - the service will be able to translate the voice message you received into the text and send it to you by e-mail;
- Free text messages;
- Cheap international calls;
- Integration - Google Voice integrates with your contacts;
- Personal greetings - it is possible to record a personal greeting that the caller will hear;

But it is better to see once than hear a hundred times. Google Voice video on Nexus One.