As the name shows, this is just WordPress version of the jQuery Lightbox Plugin written by balupton, perfectly working with WordPress 2.2 or above and fully compatible with K2.
Infinite scroll has been called autopagerize, unpaginate, endless pages. But essentially it is pre-fetching content from a subsequent page and adding it directly to the users current page. There is a little known feature in the .load() method that lets you specify the CSS selector of the html you want to include. jQuery will load in any local URL, then parse the html and grab only the elements you have defined with your selector.
