May 2017 Update: This plugin has been purchased by another company. If you’re looking for support, you can contact them at WordPress.org.
Change your sidebar content with each page. Avoid creating multiple sidebars and duplicating widgets by adding check boxes to each widget in the admin (as long as it is written in WordPress version 2.8 format) which will either show or hide the widgets on every site page. Great for use with Thesis theme, or just to avoid extra coding.
Update: Please post issues and questions in the support forum