I know (think) this has been said before, but:
Perfect way to distribute the armor : The X-Box Live Marketplace. They could make it so you can either buy just the helmet, body, or shoulders, or get the entire set for the combined price of the pieces. I would be an easy way for Bungie to make some extra money, and be convenient to players. The pieces could be 25 for shoulders, 25 for body, and 50 for helmet (or something like that), adding up to 100 Microsoft points.
Too bad they said they won't make any... :(
[Edited on 05.31.2008 12:34 PM PDT]