If you fancy yourself any kind of Halo fan, this week's Bungie Update is a can't miss. In the massive update, Bungie explains a number of different areas of Halo: Reach's multiplayer mode, most significantly how "Load Outs" will work with the previously revealed Armor Abilities.
Pre-made Load Outs can be chosen before a round begins, and can also be changed during a round while you wait to respawn. As the update explains, "Load Outs are not player created or defined, but rather playlist and/or game type specific. Essentially, they allow you to choose your Armor Ability, your starting primary and secondary weapons, and your grenade cache on the fly."