A) It is free. B) Only Google can invite you C) Its a great service, I have hundreds of accounts on my domain. I started with 250, then increased to 500 and now to 1000. Peace,
I seem to have been accepted straight away? I just logged into my google account and it gave me a form to fill in then said create an admin account for my domain... How does it work though, seeing as my domain is pointing at my site and not google