XML based RoleProvider/MembershipProvider

http://www.webpronews.com/expertarticles/2006/11/06/aspnet-xml-membership-provider

http://www.jigar.net/articles/viewhtmlcontent324.aspx

http://learn.iis.net/page.aspx/528/how-to-use-the-sample-read-only-xml-membership-and-role-providers-with-iis-70/

http://www.thewayithink.co.uk/post/An-XML-User-And-Role-Provider-for-ASPnet.aspx