In the past I've thought:
Ya know, Google's mail is more spam free than this home grown solution I've got. And their calendar solution is better than what I've put together too. I wonder if I could build a set of business tools by using existing Google apps...
Well, apparently Google has had these same thoughts too. By visiting this page you can read about a program where they are offering their apps in your organization's context.
Look out Microsoft - your days of owning the small business infrastructure (Word, Excel, Exchange, etc.) may be coming to a close.