This article on Microsoft Watch seems to be an incredible news for many readers: contrary to what many believe, Longhorn won't be built on top of the .Net Framework.
Why is this so incredible? I'm not so shocked... Longhorn must be a stable OS with high performances and can't be entirely based on .NET. .NET Framework must be an important piece of the entire OS, strictly integrated, but building important pieces of Longhorn on top of .NET for me is an hazard that Microsoft can't take. The OS core must be solid and .NET is marvellous but not so solid. 
So, .NET developers will have to cry? No... we'll have a big future also with Longhorn.