Here's an article about the Google mail service:

http://www.computerworld.com/softwaretopics/software/groupware/story/0,10801,91814,00.html

Here's a part that should scare privacy advocates:

> One way Google will pay for the provisioning of the 1GB of storage per
> user will be by selling advertisements that appear next to e-mail messages
> and are keyed to the content of each message

Francoise