Hi Kelly,
Thanks for replying. I'm hoping to be able to provide a link to the live app within about 2 weeks once we upgrade our production server to 10.1.
Regarding your question..I don't know. I've tried some of the ESRI samples that use JSONP and they all seem responsive. I'll have to see if I can create one on my end. I may have something that could fit your description but I'll need to combine bits of code to get a final test. If not, I'll update this thread with the link to my live version once we upgrade our server.