The Windows Server team announced that latest build of "Longhorn" CTP has started to ship. Existing beta testers already have access and it will be on MSDN and TechNet in the coming days.
I’m thinking that I need to wrap up my work with CM 2007 asap to get working on this. There’s some new functionality that sounds really exciting and I could have made great use of it back in 2003 when I designed and deployed a multi site W2003 AD across the world.