This is one benefit of having Google Apps for Business for big companies (or when a service involving big numbers of users). Wyoming will save Wyoming taxpayers $1 million annually by moving all state government employees to Google Apps for Government.
The decision to go Google was the result of a transparent and competitive evaluation process that began roughly two years ago. The state estimates the move to Google Apps will save Wyoming taxpayers $1 million annually. [source]
Virgin America will move its 1,700 employees corporate email to Gmail and expect to save system costs by about half.
Over the next two weeks, all of the airline’s 1,700 employees based across North America will be moving their corporate email to Gmail, and collaborating more efficiently using Google Calendar, Google Docs and Google Talk. Their migration to Gmail will cut Virgin America’s email system costs by about half on an annual basis, in addition to the long-term storage benefits where the move into the Google cloud will save them over 18 terabytes of space as the airline continue to grow and add employees. [source]