Dynamically Loading ASP.NET User Controls with jQuery

ASP.NET User Controls are pretty useful. They allow functional modules of code and markup to be encapsulated in such a way that reuse is convenient and easy, without sacrificing the power or integration of the ASP.NET model. As we move into an era of AJAX-driven websites, this modularity is still very important. Can the user controls that we all know and (mostly) love still help with this encapsulation, despite being engineered before AJAX techniques emerged? I think they can. But at this point in the ASP.NET timeline, user controls are in need of some help. [Detail]