Google is testing a new service with schools, corporations and organizations by hosting Gmail accounts with their very own individual domain addresses. With Gmail for your domain, you can give Gmail to every user at your domain. Google is now accepting domains for this limited beta test. Gmail for your domain comes with the standard 2 gig of storage, search tools and control panel.
(Thanks Andy Longe)
Update: One of the schools testing out Gmail for your domain is San Jose City College. You can view the login page here.
(via The Unofficial Google Weblog)