I was wondering if anyone has extensive experience with specifically the new Interactive features of InDesign CS5. I am an avid Fireworks user, but I was recently informed that InDesign, in this latest release may be the application to beat. I have played around and found the new object states, animation (presets only) e.t.c in the Interactive section interesting. I am quite a fan of InDesign for wireframing (eightshapes Unify), but still find Fireworks still seems more powerful for prototyping because you can export to HTML, import SWF's into it for more complicated smooth interactions designed in Catalyst or Flash, use IxEdit if you like to test out AJAX (HTML/CSS Export).
My tests reveal that the only way to export out of InDesign CS5 and maintain the smooth interactions is via swf or Flash. The PDF export won't support Flash automatically unless you consciously embed a external swf (same workaround for fireworks).
Other great improvements is the ability to specify everything now in pixels rather than points, but the app still feels very print centric. For instance the color picker does not support Hexadecimal, swatches are CYMK by default, snapping to full pixels only is not possible.
It would be great to be able to use one App for UX work, but for now it will be a mix of Omnigraffle, Fireworks, InDesign and other creative suite apps as needed. Yes I have tried Axure, iRise, justimind prototyper e.t.c. they require too much bitmap prep and the drawing tools are crude. For the same effort I would rather use HTML/JQuery or IxEdit.