Found a couple decent lists.
This one especially:
http://www.nextmovie.com/blog/best-movie-cameos/
How could I forget Bob Barker in Happy Gilmore?
This one isn't bad except for the fact you can only see one at a time:
http://www.empireonline.com/features...ovie-cameos/p1
Even that list contains a few that to me seem like they are just small parts and not cameos. Like Judy Dench as the Queen in Shakespeare in Love. That's not a cameo. She won a freaking Academy Award for the part.