Hi Loren,
This thread caught my eye, as I'm new to Axure and interested in simulating this type of functionality. A quick background: I'm a user experience designer that works mainly on mobile designs; a lot of my recent work have been for touch screen phones such as the iPhone and Android (G1). I create mid-fidelity mockups in Visio, usually describing the behavior in an accompanying document. This is where I saw an opportunity for Axure: the specification, mockups, and prototype are all handled by one program.
Unfortunately, I'm having trouble ramping up in Axure, as most of the application is catered to web pages. To truly simulate a touch screen mobile device, I need the drag behavior to scroll a screen, much like your carousel. (Actually, even non-touch screens will be very much like a filmstrip where the user can see only a given amount of "strip").
I hope that support for mobile screens and their interaction styles are expanded further in Axure 5.5 beta and beyond. It's the one killer feature that holds me back from buying site licenses for our team.