As a resolution, I ended-up converting the user control to a web page and loading via iFrame. This works well for our current needs, but I would like to explore a method that does not utilize iFrames... I have encountered contention issues previously across js frameworks and resolved by encapsulating two versions of jQuery on the same page by using noConflict (http://api.jquery.com/jQuery.noConflict/) - what's the best way to do something like this with the ArcGIS API?
Any architecture/design help would be appreciated! A demo app would be welcomed!