I am at a loss here too! I can find absolutely nothing.
Hi, Mac Liems -
I've asked the Captivate engineering team to help with this. Keep an eye out for a response on this forum or on the Captivate blog (http://blogs.adobe.com/captivate/2010/10/flex-based-widgets.html).
Hope this helps,
Flash Builder Community Help & Learning
Adobe Systems Incorporated