In this video from dpankar we learn how to invite others to Google Wave. In your own Google wave, click on all. This will open up your wave. There is an option there that says Invite Others to Google Wave. Click on that. Then on the right side of your screen a window will open up where you can enter an email address to invite someone to Google wave. In the box, type in the email address of someone you know that you would like to invite to Google wave. Then click on the button that says Add to invitation list.