No, there isn't a new version of the VS extensions for WF. In order to get the new project templates you will need to upgrade to Visual Studio 2008. To get the new SendActivity and ReceiveActivity just install .NET 3.5 on your computer, which can be found at
http://www.microsoft.com/downloads/details.aspx?familyid=333325FD-AE52-4E35-B531-508D977D32A6&displaylang=en. To see the new activities you will need to manually add them to the toolbox. To do this right clicking on the toolbox and select Choose Items... When the dialog appears select the Activities tab and click on the Browse button. Select System.WorkflowServices.dll found under %ProgramFiles%\Referenced Assemblies\Microsoft\Framework\v3.5 and make sure that the ReceiveActivity & SendActivity are selected, then click OK. The workflow services samples can be found at
http://msdn2.microsoft.com/en-us/library/bb410769.aspx.
