Check out this completely inspiring presentation by Shigeru Miyamota regarding game design and the new Nintendo Wii console. There's some lessons here for all kinds of designers and developers. I especially like how Miyamoto talks about designing games with the goal of eliciting joy from people, and ways he tries to achieve joydom. There are a couple thinly veiled barbs at Sony. Excellent presentation!
GDC 2007: Nintendo Keynote Video
Wii Media (Posted: Mar 8, 2007)
Miyamoto discusses his vision of future game development.