I just saw that Infosemantics have released a new widget which they call the Interactive Master Widget. The name alone is cool, but once you see what the widget can actually do you will be pretty impressed I can assure you.
The short description of the widget is as follows:
The Interactive Master widget enables Captivate developers to create complex e-learning interactions using multiple interactive objects such as buttons, click-boxes, text-entry boxes, and other interactive widgets made by Infosemantics.
Basically this widget allows you to build some insanely complex scenarios and interactions on a single slide in Adobe Captivate and then report the succes or fail as a single score. This will really bring more or less unlimited possibilities to you as a developer to create some very cool stuff in Adobe Captivate.
You can read a detailed description of the Interactive Master Widget here.