Lawsuit
As of November 2009 Steam will shut done after enduring several lawsuits from multiple game companies. Ubisoft and Activison have sued Steam of illegally distributing games through the steam application. Members are able to illegally add games using serial numbers given to steam users. The Lawsuit ended with Ubisoft and Activision winning the case and Steam has until November 2009 to shut down.
it can be found here:
http://en.wikipedia.org/w/index.php?title=Steam_%28content_delivery%29&diff=prev&oldid=317893896#Lawsuit
it's the last entry in the article


















