While I was examining Olivier Carpentier's WSS List DataSource on http://www.codeplex.com I decided to try and create a similar tool for MCMS. The basic idea was to create a custom placeholder which allows content editors to select WSS lists from a remote MOSS server. But first, a few words on MCMAS custom placeholders: A Placeholder is a control which has 2 major instances – one for users where it displays the content and one for the content editor so they can alter the content. Creating a custom...