Everything you want to know about Visual Studio ALM and Farming
Brian Harry is a Microsoft Technical Fellow working as the Product Unit Manager for Team Foundation Server. Learn more about Brian.
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Like Beta 2, the RC is a supported, "go live" release, able to be used in a production environment. If you already acquired your support ID for Beta 2, it will continue to work for the RC. If you haven't gotten it yet, here's how you can: http://blogs.msdn.com/bharry/archive/2009/10/26/support-for-vs-2010-beta-2.aspx