http://www.illegal-art.org/
Just found this site, and it's amazing. Click on "Visual" on the right to see artwork that artists are sued over by companies. It's all mostly parody stuff (Starbucks logo that says "Consumer Whore"). Matt Groening even sued someone for using his rabbit character. Some of them are pretty funny too.
This is like the shit that got DJ Danger Mouse on the news for making The Grey Album.
