This would be fine if your app didn't need to know anything about the user, but let say you wanted some featurs in your silverlight app to only be available to users in a particular dnn role. For this to work the authentication and roles membership info needs to be passed to the silverlight app. RIA services authentication does this just fine for a standard asp.net web app that uses the standard authentication and membership providers. For this to work with the DNN authentication and membership providers a custom RIA authentication service must be crafted, this is what Philip Beadle did in the above mentioned post, but it doesn't work in the new RIA framework. As far as targeting .Net 4 in your new modules, it's posible as long as the app pool that your DNN site is configured to use is set to Framework 4. The min version of DNN that is .NET 4 aware is 5.4.1 I think. read this: http://www.dotnetnuke.com/Community/B...

Jack, download the CodeEndeavors Silverlight Mdule template from codeendeavors.com. I installed that into vs2008 then just copied the C# templates over to the vs2010 templates. They use ([moduleview].js) java script with delegates and reflection to send userdata to the SL App. I managed to tweak that a bit to get the ExpiryDate from UserRoles. You could probably do the same if you don't need to send anything back to the server. IF you do manage to extend that well enough to retrieve your own module-data, I'd be curious to know. I just don't understand enough about reflection and delegates to do ALL that I want but enough to move forward in some way. I'd like to see that whole design extended to get any data AND return data in an Add/Update. That way we would not need WebService or RIA... That template is great, packages everything nicely and seamlessly installs into your DNN dev instance BUT, there is ZERO help/support. ZERO! Cheers