I just spotted the the RSS aggregator application wasn't holding the login credentails to enable people to add their own RSS feeds to this application. This was due to the machinekeys not being the same in each web.config. To test it now, login to Online Archaeology: http://www.online-archaeology.co.uk Then click on the 'Archaeology News' image on the home page, or the 'Go to the Archaeology News Aggregator' link. This will take you to this page: http://www.online-archaeology.co.uk/Feeder/ You should now see your login name and a link: 'Add a feed'. Click that link and you will be able to add as many RSS feeds as you like. No-one else will see yours, and you can only see and edit yours when you are logged in. Your feeds will then be visible when you expand the 'My Feeds' node in the tree on the left.