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

Then there is the VS 2010 Training Kit: http://www.microsoft.com/downloads/details.aspx?FamilyID=752CB725-969B-4732-A383-ED5740F02E93&displaylang=en

Get into them.