Beta invite friends

We all have used them, when you sign up to a new website and they allow you to invite 100 users or something. I need this done, for our company. We need you to link into a users Yahoo and Gmail account and allow them to select who they want to send emails out to. From there the emails they select need to be issued beta codes and an email sent out. YOU MUST BE ENGLISH SPEAKING, AND WORK IN AUSTRALIA This job should only take a few hours of coding, I have coded all of the site, and database so you will be dealing the the designer and coder of the site.