If I want to deploy an ASP.NET application that hosts RIA Services endpoints for a Silverlight application, do I have to install anything extra on the web server? Or is it just some extra DLLs that can be deployed to my applications Bin folder?
I know that when you are doing RIA Services development there are additional toolkits and what-not to install, but I'm not sure if those are needed on the server.
Your webserver will need to have .Net 4 installed, and you will need some DLLs. It is possible to publish by setting these DLLs to "Copy Local" = true.
You can also just install the exe as shown here: http://blogs.msdn.com/b/deepm/archive/2010/03/15/are-you-a-hoster-and-want-to-support-ria-services.aspx
Further Reading: http://blogs.msdn.com/b/saurabh/archive/2010/03/16/ria-services-application-deployment.aspx