The second of GameSpy's series of interviews for the week before Halo's release is already out; in it, Tyson "Ferrex" Green talks about some of the weapons in Halo 2, about the changes made to some of our old favorites, and the weapons that will soon be our new favorites.
Among the more interesting points: you can now snipe grenades in mid-air to detonate them (if you're a good shot) and weapons specially designed for melee combat do more damage when used in that mode (the plasma sword and the brute shot, for instance).