I just received this message from one of my GoogleApps domains:
Google Apps accounts are undergoing an improvement, allowing you to give users access to over 60 additional applications from Google. We encourage you to transition your organization’s accounts on your own schedule now.Finally! I am excited to try out the new improvements. It's been a year since they announced these changes were coming. "
There are several advantages to transitioning on your own schedule:
Make the change on your own timeline
Have time to try the new infrastructure with a subset of your accounts first
Use automated mailing lists and email templates to pre-notify your users
Get access to over 60 additional applications from Google right away