We all know the value of using widgets to customize "the sidebar" of Wordpress themes, but the underlying system is rarely used to its full potential. By creating many specialized and contextual sidebars any part of a theme can quickly be made customizable and extensible. This talk will cover all aspects of widgetizing themes, including how to register sidebars, problems to watch out for and tons of ideas for how to make the most of them. Theming and PHP/HTML knowledge definitely a plus, but not necessarily required.
[UPDATED TO REFLECT EDITS FOR WORDCAMP NYC 2010]