The Premier Edition offers the best of Google Apps. If you're looking to complement your existing IT infrastructure (account management system and/or Intranet), you can access extensibility APIs to integrate your entire organization with Google services.
Some features include:
* $50/user account/year
* 10GB mailboxes
* User account provisioning
* Single sign-on
* Email gateway
* Email whitelist
* No ads displayed on Google services
* Access to Google partners
Google offers 24/7 assistance, including telephone support for critical issues. Google Apps Premier Edition also includes a 99.9% uptime guarantee for Gmail.
You can read more about how Google Apps has already helped many organizations around the world.