The system works by recording user submitted websites against pre-defined categories. Each user specifies the categories of their interest and relevant sites are served to these users along with the ability to rate the site. This process means that the users of the system share their recommendations and qualitatively review them before they get to you.
This new way of finding and sharing interesting sites is fast and extremely entertaining.Oringinally, the system worked on Firefox only and was, for a while, one of the best reasons to use the Firefox browser. It is now also available for IE7, allowing more people to participate.
Check it out at www.stumbleupon.com