Microsoft .NET 4.0, and WCF 4 and WF 4 are all comming..... VS 2010 is availbe for beta 1 download..... Now you need to get up to speed.... have a look at the training... WCF / WF 4 Training Kit: http://code.msdn.microsoft.com/wcfwf4/Release/ProjectReleases.aspx?ReleaseId=2698   more »