At last, I can stop apologizing to Paul Sheriff, as we've finally published his article.
In Single Sign-on Enterprise Security for Web Applications Paul shows how to create a solution that enables multiple intranet applications to share a single sign-on for security. It's an excellent solution to a common customer request. This is the article that goes along with the recent webcast he gave just the other day (which is now available on-demand).
TTFN - Kent