Interesting Stuff

In Bunker 2 there is a computer with an animated man skateboarding against a green background. According to Project Lead Martin Hollis the man is programmer Mark Edmonds, who otherwise did not wish to appear in the game. (Source)

That said, Edmonds' head actually is in the game as a random guard head, the head for the Russian Soldier multiplayer character, and the hidden character Mark.

There's a head model with the file name "CheadsallyZ." Sally is a real person who worked as cleaning staff at Rare's offices. One day character artist Brett Jones asked if he could take pictures of her face for a game. Sally was a little puzzled but acquiesced. In the final game her head is mostly unused but can be unlocked as a hidden character. (Source: GoldenEye 007 by Alyse Knorr, p. 57-58)

Everyone has used the Watch Magnet Attract to grab the key off the wall and escape from Bunker 2's jail cell. But this gadget will actually pick up anything the player can pick up. That includes guns, throwing knives, keycards, and even the Flight Recorder in Archives once the safe is open.

I only slightly question its ability to pick up the Severnaya Stafflist, because that does not seem to be made of anything magnetic.

The only reference to game developer Rare inside any level is this lone graffiti placed low on the wall towards the end of Depot. There are probably literally millions of people who ran by this without noticing.

While equipped with the Camera gadget and holding L or R you can use and to zoom in and out just like with the Sniper Rifle.