Another cool new feature of Spry 1.4, and I don't even have to write a blog entry on it. Bruce Phillips has a blog entry and demo showing off this new feature. At a basic level it gives you a super simple function to change the content of a element with another URL. So an example, if foo was an element, this would replace it with another URL:

Spry.Utils.updateContent('foo', 'mynewdata.cfm');

You can even fire off a function automatically when the data is downloading.