SproutBuilder is going to explode the world of widgets on the web. This is far and away my favorite product I've seen at DEMO, not just this year but ever in the three years I've attended. Limited beta accounts are available to RWW readers via http://www.sproutbuilder.com/readwriteweb

The product is a drag-and-drop Flash authoring tool built on Adobe's Flex. SproutBuilder lets you build very sophisticated, multi-page widgets with media, analytics and more. In minutes. With ease.