On November 14th, from 9-10am PST, I'll be giving a web cast covering our new Sync Services runtime.  The abstract discusses existing technologies, including RDA and Merge, but based on customer feedback, it seems developers really want to see the new sync framework, so I'll be showing mostly code on how to use our upcoming sync services. 

You can register here:
http://msevents.microsoft.com/CUI/WebCastEventDetails.aspx?EventID=1032312755&EventCategory=4&culture=en-US&CountryCode=US

Steve