"My Object Oriented CSS grids and templates are open sourced on github. They have all the functionality of YUI grids plus some important features."Over at github you can view a slideshow that describes OOCSS in visuals. They explain:
"Nicole first presented Object Oriented CSS at Web Directions North in Denver. Since then, the response has been overwhelming. OOCSS allows you to write fast, maintainable, standards-based front end code. It adds much needed predictability to CSS so that even beginners can participate in writing beautiful websites."