A couple of months ago, Ian Lunn has created a jQuery Vertical Parallax Demo that manipulated CSS to make multiple backgrounds move at different speeds relative to the users movement of the scroll bar. This type of effect is slowly appearing across various websites on the web, achieved using many different techniques. Nikebetterworld took the idea to a new level.
Now Ian Lunn has written a tutorial that took the original jQuery Parallax script he wrote and recreated a webpage with Nikebetterworld Parallax Effect. And also, he has turned the tutorial into a jQuery Plugin, you can download and fork it on Github.
Requirements: jQuery Framework
License: GPL, MIT License