Class.Mutators.jQuery.js

Class.Mutators.jQuery = function(name){
	var self = this;
	jQuery.fn[name] = function(arg){
		var instance = this.data(name);
		if ($type(arg) == 'string'){
			var prop = instance[arg];
			if ($type(prop) == 'function'){
				var returns = prop.apply(instance, Array.slice(arguments, 1));
				return (returns == instance) ? this : returns;
			} else if (arguments.length == 1){
				return prop;
			}
			instance[arg] = arguments[1];
		} else {
			if (instance) return instance;
			this.data(name, new self(this.selector, arg));
		}
		return this;
	};
};

Person.js

var Person = new Class({
	
	Implements: Options, 

		options: {
			height: 'tall',
			weight: 'fat'
		},

	jQuery: 'person', // must be after options definition

        

	initialize: function(selector, options){
		this.setOptions(options);
		this.jqueryObject = jQuery(selector);
	},
	
	dance: function(whichDance){
		// dance the whichDance
	},
	
	combust: function(){
		// combust
	}

});

usage.js

// instantiate the class
var instance = new Person('#dude',{ height: 'short' });
jQuery('#dude').person({ height: 'short' });

// call methods
instance.dance('salsa');
jQuery('#dude').person('dance','salsa').person('otherMethod');