jQuery Boilerplate Ability to add $.myplugin to Return Value or Object

Question

I am creating a jQuery plugin from the jQuery boilerplate. I've been successful in my implementation so far.

However, I would like my plugging to to be called like this

$('selector').myplugin({data}) -- and have it return a chainable object

or

$.myplugin({data}) --and have it return something (string, object, array).

I read around about moving the this.each() ... return this to each method, but I am getting

TypeError: undefined is not a function (evaluating '$.myplugin()')

Example:

Here's an example of what I would like to do.

<input class="textIn" type="text" />
<input class="textOut" type="text" />

<script>
  var input = $('.textIn').val();

  //CASE #1
  // will perform method named someMethod with an arg and return a value
  var output = $.myPlugin(someMethod, input);

  //CASE #2
  // will go through each node with class 'textOut' and perform someMethod with an arg
  $('.textOut').myPlugin(someMethod, input);

  //CASE #3
  // will go through each node with class 'textOut' and perform someOtherMethod
  $('.textOut').myPlugin(someOtherMethod);
</script>

Maybe case #1 and #2 cannot be combined and I will have to rename the method, but I'm not sure. Any help would be great!