Bring Gmail to your domain.Discussion ForumThis special beta test lets you give Gmail, Google's webmail service, to every user at your domain. Gmail for your domain is hosted by Google, so there's no hardware or software for you to install or maintain.
Want to be part of this beta test?
Gmail for your domain is currently available as a limited beta. If your organization is interested in helping Google test this service, we'll consider your domain for this beta. You'll need to sign in with a Google Account (or get a new one), and answer a few quick questions about your organization and your email needs.
Related:
http://www.primary0.com/2006/06/04/screenshots-gmail-for-your-domain/