How to do voice chat with iChat by configuring Google account

The way I solved this was by waiting to be invited to the TextFree beta which has voice. It will allow you to accept voice calls, which is what is required by Google Voice to verify a phone number.

In more than one case now, it looks like multiple copies of the name will show up. You have to either check the buddy picture or other features (for example, video chat doesn't show up for Facebook) to determine which network you are contacting them on.