No, just iScroll. I don't think you can make a UI like we have with jQuery mobile or any other mobile "widgets" framework.
They can only go so far - they give you one standardized experience.
If you want real awesome stuff, you have to hand-code, and for that you want a framework/library that supports hand-written custom code well; thus Prototype.js is the optimal choice here.
Are you using any mobile libraries/frameworks (other than the mentioned iScroll)?