Dear Microsoft Beta Tester,
Microsoft is pleased to announce the release of the Virtual Server beta. The Virtual Server beta is available for download from https://www.beta.microsoft.com. The Passport account used to access the Virtual Server Customer Preview and the Beta_ID and password used to access the Virtual Server Customer Preview newsgroup are valid for the beta program also. Details of the differences between the Customer Preview and the beta releases and details of how to migrate an existing Customer Preview environment forward to the beta are detailed on Betaplace and in the beta release notes.
News source: BetaPlace