I cannot find how to register/subscribe etc. Could someone please direct me to the correct URL?

Unfortunately, the current release of the portal does not provide personalization - hence user registration is not yet supported. The sign-in button you see at the top of the portal is only available for our portal administration crew. But here are the good news: We are currently working on a new release which will provide personalization. We plan to go live with this new release with more data, better search performance, a better look and feel and personalization in June/July 2010.