The loot rules will remain the same for Cata as they were in WotLK with one exception. That being epic BoE items will be handed out only if they can be used. Otherwise they will be sold on the AH with a percentage set aside towards raid funds, the rest will be handed out to the members of the raid.
Raid funds cover buying mats for flasks, food, enchants, etc... that are used during the raid and are not farmed up. Those materials will be kept in the Stoli Bank tab of the DB Guild Bank. They will be available to all raid members, those not in the guild will have to speak to me (Bogre) for deposits/withdrawls.
Let me know if you have any questions.