You're asking me to inconvenience my organization by deploying pre-release (unstable, admit it) software that every single employee uses CONSTANTLY; and then you offer nothing in return. The "privelege" to test something for you and actually talk to you about your bugs is not an incentive. If you had added that you would give me the release version for free, with the same level of licenses that I currently have for Exchange 2003: Then I'd be all over this. My company (50 people, 2 exchange servers in a front-end/back-end config) would be willing to put up with some email problems for a free upgrade of Exchange. But alas, the only incentive you offer is a firm poke in the eye.