Despite having been around for a while, Google voice is still in invitation-only beta mode. However, the search engine giant today announced that their Google Voice service will now be open to any student with a .edu email address.
Google posted on its blog today, 'We’ve found that Google Voice can be useful in many different ways to many different people. But one group of people that it’s especially well-suited for is students. We’ve heard college students in particular really appreciate getting their voicemail sent to their email, sending free text messages and reading voicemail transcriptions rather than listening to messages (especially handy while in class).'
Since Google is allowing anyone with a .edu address to register, we don't see why faculty and staff who also have this type of address couldn't also register.
You can register to get your student Google Voice invite on Google's Voice for Students website. The site notes that you should get your invitation within 24 hours of submitting your email address.