Here is a good example code for twitter like load more button in both jQuery and MooTools: http://net.tutsplus.com/tutorials/javascript-ajax/create-a-twitter-like-load-more-widget/ I’ve tried MooTools version and worked fairly well (For IE, you need to remove the last comma ...
I recently came across this great JavaScript library called TextboxList by Guillermo Rauch which will convert good old input fields into Facebook like input fields. Even though there are tons of JavaScript libraries out there, ...