Embed External Div

An iframe would be the closest thing that I can think of for doing this.

 

An iFrame would be the only way to do that, and that would only allow for loading of a full site, not just a specific div.

There are ways to use javascript to load a specific div from one page onto another (jQuery's ".load" function is probably the easiest), but Ajax's security policies only allow this to be done from pages on the same domain.