Another product to point out in the ever evolving world of server hosting is Mailtrust, another product now being run by Rackspace. They are currently offering their hosting email business solution Noteworthy for $1 a month per 10GB mailbox. Very good deal if you ask me, especially for triple redundant business class email. The best part is, if you have power-users in your workgroup/domain that need Exchange, you can integrate them right into your environment with Mailtrust with their Exchange hosting Hybrid solution.