I'm not finding any documentation on impersonating a Windows LiveID over a WCF data service. I can find documentation on Windows Auth. For example, this article is great, but its first step is "Configure Your Service to Use Windows Authentication":
http://geekswithblogs.net/manesh/archive/2009/04/23/setting-up-wcf-to-impersonate-client-credentials.aspx. I'm not sure how to do this when I'm working with the LIVEID.
Alternatively, and even preferably, if there's a way I can manipulate the connection string the data service is using from the WCF endpoint, that would be ideal. I need to grab some info about the user in the Silverlight app that's using the data service,
and somehow impersonate that user. The user is a Windows LiveID, which is what I have hard-coded in my connection string in my web.config.
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