Google Apps -- Cloud-based productivity tools

Millions of users take advantage of Google's free web-based apps: documents, calendar, tasks, gmail and more. Many are not aware that for a smallish fee, those apps can be operated under a custom domain name, along with substantial additional storage space. A business can have secure email running under their own domain name, a reasonably capable suite of office applications plus a calendar/tasks app -- all of which can be accessed in exactly the same form from any web-connected device, anywhere in the world. All of which must be causing something akin to terror among those who traditionally overcharge the public for less flexible services (Microsoft, anyone?). Yet another instance of the paradigm changing business model Google is successfully pursuing.