I’ll make a note of your request for when resources become available.
In terms of your question about linking email URLs to portals, if you mean you want to click a URL contained in an email and have a portal automatically activated, unfortunately the answer is no. In order to provide this type of functionality we would have to create a mechamism that would allow applets to run in response to HTML events. This is something we want to avoid from a security perspective. Please let me know if I have misinterpreted your question.
I would need more information about your objectives in regards to showing a URL as an XML page.