My company Neudesic will once again be hosting NuCon, a deep dive conference into .Net 3.5 and Visual Studio 2008 including LINQ, ADO.Net 3.5, Silverlight and TFS. Microsoft's new IO model (Infrastructure Optimization) will also be covered in one of the tracks.
This year the conferences will take place in Chicago, New York, and Denver starting on February 7th in Chicago.
Space is limited. Get more info and sign up at the NuCon 08 conference site.