Hi jmcfet - Pleased you're considering us.
A bit confused by the request. The Silverlight navigation framework belongs to Silverlight and isn't specific to RIA Services. It has no bearing really. For example, I had no navigation issues related to converting the RIA Services SuperEmployee to use DevForce.
We have not documented anything relating to Silverlight navigation (just as we haven't had anything to say about how to animate view transitions or any of a hundred other UI layer issues). Of course these things are critically important to many developers; we just aren't prepared to take on documentation of Silverlight itself.
Having set that expectation, I'm curious about what specifically you would like to see us discuss about the points of intersection between navigation and the data services infrastructure (RIAS or DevForce). How to relate deep linking to an entity search? Is it that we don't have a template with both navigation and DevForce libraries baked in?