A couple of weeks ago I stumbled upon this interview ( or Iwata Asks type of moment ) with Satoru Iwata, President of Nintendo (Former President of HAL Labs) and Shigesato Itoi (Of Mother/Earthbound fame). Just a few days ago I actually got around to reading all of it, and it really has some interesting information. 
In fact, pretty much all the Iwata Ask's articles have interesting information, and I highly recommend that every one read them even if you don't like the games, or hate Nintendo and what not. 
 
So yeah, this piece is from 2007. They get talking about the DS, Shigeru Miyamoto, game philosophy, development problems during Earthbound, and how Iwata used to spy on Miyamoto to find his "secret". 
 
Its also interesting when they get to the part of game sequels as "taking the easy way out". Which is funny because some of the bigger games next year are just sequels. (Forced Unleashed 2, Batman 2, Dead Space 2) 
 
"The Definition of Idea"