Samples and documents describing VB 10.0 language and IDE features are now available.

From someone at Microsoft:

Samples for the CTP are now available on http://code.msdn.microsoft.com/vbfuture (previously we'd uploaded the wrong file). When you open the .zip there'll be a folder called "Visual Studio 2010 Samples" which contains projects for Implicit LC, Auto Properties, Collection Initializers, and Covariance. Statement lambdas is in the CTP as well, but we don't have a sample for that yet.