Granted, this is interesting to only a few of us who have too much time on our hands, but I thought this article was fascinating.
http://www.nytimes.com/2008/05/18/magazine/18rebranding-t.html?_r=1&bl=&ei=5087&en=83eb4c2fe9254961&ex=1211256000&oref=slogin&pagewanted=all

It might be fun to see a list of all those brands that have mysteriously disappeared. BTW, What happened to Gainesburgers?