I’ve been writing a lot about building WPF business applications with Entity Framework using Visual Studio 2008. If you’re just starting this type of development you may want to read the following:

I also highly recommend Julie Lerman's Programming Entity Framework book.

I’ll be adding more articles and How Do I videos so you may want to keep tabs on me and the EF team blog. :-)

Enjoy,
-Beth Massi, Visual Studio Community