Google Blogoscoped has an item about the latest with Google Analytics. The company is now saying that some people who previously submitted their email address will "shortly" receive invitations allowing them to register and use the service. Just how many invites are being sent out is not specified in this Google Analytics "status update". However, it does say that, "not everyone who previously sent us an email address received an invite."
This update adds:
Currently, we don't have enough capacity yet to re-open signups for everyone who wants an account...We will continue to send out additional invites as we add more capacity. If you haven't submitted your email address to us, please do so on our signup form.