What are you the most excited about in the new versions of jQuery? [closed]

Question

Believe it or not, the "FINALLY" moment for me was the addition of delay():

$("#notice").slideDown('500').delay(4000).slideUp('500'); // = Pure awesome :)

The ability to create elements on the fly in a more terse manner, by passing all attributes as the second argument to jQuery():

jQuery('<div/>', {
    id: 'foo',
    mouseenter: function() {
        // do stuff
    },
    html: jQuery('<a/>', {
        href: 'http://google.com',
        click: function() {
            // do stuff
        }
    })
});

All non-attribute properties map to the corresponding jQuery method. So having html there will call .html() and having click will bind a new click event via .click()...

Best feature in my opinion is allowing functions in setters:

jQuery('li.selected').html(function(i, li) {
   return "<strong>" + li + "</strong>";
});

A lot of code that required $.each can be removed now.

I don't really have a favorite, here's an overview of 15 new features for those who don't know what this is all about:

http://net.tutsplus.com/tutorials/javascript-ajax/jquery-1-4-released-the-15-new-features-you-must-know/