Oh, there are many of those. But http://www.youtube.com/watch?v=xq0ZJgb-VX4 is first I think when it comes to nostalgic intro's
That totally reminded me to post http://www.youtube.com/watch?v=K_AdxJWFUh4&feature=related. Talk about your classic Saturday morning cartoons.
http://www.youtube.com/watch?v=hy-H-KJRYbw
http://www.youtube.com/watch?v=j2tQKejS9Fo
http://www.youtube.com/watch?v=ux8mJUexBcM
http://www.youtube.com/watch?v=NJPYmd8_Qdw
All I can think of, but I know there's more. All nostalgia based though, but other than that I rarely pay much attention to intros.