If the name Alan Kay doesn't mean anything to you, it should. He coined the term "object oriented', and is essentially the elder statesman of the community. He's absolutely mesmerizing to listen to, especially when you get an insight on where he comes from and why he says what he says.

If you're serious about OOP, then this should be considered required material:

www.educause.edu/conferenc...ast98.html -- "The future hasn't happened yet."

This is the basic "meet Alan Kay" video, a lecture where he's addressing educators (his core concern and the motivation behind SmallTalk, OOP, et al.)

www.lisarein.com/alankay/tour.html -- towards the top are a link to the videos. -- Some redundancy with the above video, but including a really cool tool of the Wonderland concept -- an VR collaboration environment that you'll simply have to see to believe.