Use these login names:

Flamdwyn Aiobhell	Unlimited ammo
Monty Barrymore		Unlimited ammo and invulnerability
Lyn Wins		Unlimited ammo, invulnerability, and enables
			other cheats

Other Cheats:

SHIFT-CTRL-ALT-TAB	Speed warp
ALT-V			No fuel
SHIFT-V			Refuel
ALT-T			Overtorque toggle
CTRL-T			Terrain-following toggle

Thanks to Revolution readers Andrew D. Moore, Lars í„hdel, and Luke M.!