http://www.kiesler.at/article202.html
phpNuke is a well-known portal solution and the base of a lot of other open source CMS projects. Think about postNuke, phpWebSite or Xoops. I did an interview with Francisco Burzi, the man behind the phpNuke project.
Mr. Burzi tells about his family, his job, the future of phpNuke and his thoughts on theoretical aspects of content management systems.