These links show the evolution of some of the world’s best know and most visible logos.
It’s interesting how much some have evolved and have changed entirely (Apple, Nokia), while some retain much of their original look and feel (Starbucks, BMW). If you look at the difference, it’s really that the ones that haven’t changed much were fairly simple and well designed in the first place, while the ones that have changed significantly were usually complex and poor to start.
Speaking of Apple, here’s an interview with the designer of the Apple logo:
That’s the short version, but for all you Apple/design fanatics, there’s a link in there for the complete interview. There is some good info about logo design in there.
Thanks to Matt Brown for the links.