ender delay()

ender.delay.js

!function ($) {
  $.ender({
    delay: function (n) {
      var mock = {}
        , chain = []
        , key
        , $el = $(this)
      for (key in $el) {
        if (isFinite(key)) continue
        !function (key) {
          mock[key] = function () {
            chain.push({key:key,arguments:arguments})
            return mock
          }
        }(key)
      }
      setTimeout(function () {
          for (var i = 0; i < chain.length; i++) {
            $el = $el[chain[i].key].apply($el, chain[i].arguments)
          }

      }, n)
      return mock
    }
  }, true)
}(ender);



$('p').css('color', 'red').delay(100).addClass('a').hide().delay(200).fadeIn()

_chain is on mockObj rather than being a separate variable for a special reason?
$el should probably be var $el I'm guessing.
&, lastly, the additional function inside the first loop seems a bit heavy handed to me, if it's just to get a copy of key perhaps something like key:''+key would do that without the overhead of a new function each time?
Interesting idea though. Tests for it would look pretty funky.
I dunno if you wanted public comment on this or not but there you go! Couldn't help myself.

you have way too much time on your hand. this was meant to send to a coworker as a simple proof of concept