Users are getting the same email that other Gmail users have been receiving throughout the past week. Admins are getting a different email, however. Here's what it says:
Dear Google Apps administrator for YourSiteHere.com,
We're getting rid of over 60 different privacy policies across Google and replacing them with one that's a lot shorter and easier to read. Our new policy covers multiple products and features, reflecting our desire to create one beautifully simple and intuitive experience for your users across Google products.
As always, Google will maintain your data in strict compliance with the confidentiality and security obligations provided to your domain.
Google Apps boasts 4 billion businesses.
More coverage of Google's privacy changes: