I just want to let you know that the 4'th and 5'th parts in the series Build an AJAX-Enabled CMS with Visual WebGUI was published and is available for free reading on DevX.
They follow up the 3'rd article, showing how to create implementations for three different visual components for the menu system. Regardless their concrete implementation, they share common interface recognized by the menu controller, enabling the developer to easy switch from a menu type to another, and even to mix and match various menus to build a rich, appealing user interface.
The articles come accompanied by downloadable code.
Please feel free to comment and I'm eager to hear your oppinions.