[mattwdelong]

This is not really a well thought out response. Most businesses don't have the resources to employ a system administrator to manage their Windows install, let alone manage all the other services required to run to meet the same level of functionality that "ready to go" services like Google Apps provide. Seriously.

[meaty]

You still need an administrator for google apps.

Managing a file server, even if it's just a static workstation on a windows network is easy from security to backup - it's all guided configuration.

Seriously - everything that google apps does can be done on offline MS office and a cheap hosted exhange account.