…all that most companies do with their IT infrastructure offered for less with Google in an ASP model:
https://www.google.com/a/help/intl/en/admins/editions.html
Will it catch on in the enterprise? I’m not sure we will see large organizations switching over just yet. But, many times, the more cost-conscience small and mid-size business become the test bed for the enterprise and it will be interesting to see how this trend plays out.