I highly recommend this recording of Linus' talk as part of the Computer History Museum series on YouTube.
It's an amazing recollection of how the Linux OS came to be, and for any true computer science geek, there is not only heaps of hardcore technical stuff (like when Linus get's excited about The Protected Mode versus The Real Mode! ;D) but also just some really inspirational stories of what it takes to change to world.
Makes you want to hack out some assembly code and rebuild your favorite 80's video game! Mine would be Pong!