While I'm a big fan of the off kilter Banjo-Kazooie, I confess I never made it out to Banjo-Tooie. The game obviously has huge fans, which isn't always the case for a sequel.
If you consider yourself one of them, you might get a real kick out of this short documentary that Rare have released. It goes into the making of the game, and reveals a fair amount of secrets about the sequel's creation. Even as a guy who hasn't played the game, this is really interesting.
Take a look: