First up is tabards -- he says that there are no plans to move tabards from the bags to the UI (as with the pet and mount changes), but that players shouldn't worry too much, because Blizzard is making it easier for players to get lost and destroyed tabards back if necessary. Since the Championing mechanic means we won't have to wait till Exalted to get tabards, there'll be a tabard vendor in Dalaran that'll have most of the tabards you need at a relatively cheap price.
And "keys" that aren't keys are also mentioned -- by this, we mean things like the Scepter of Celebras or the Mallet of Zul'Farrak; attunement items, in other words. Tigole says there's a plan for these also (another "keychain" tab, maybe?), but that we won't see it in time for the expansion.
Good news on both ends for people short on bag space, even if we have to wait a while. Personally my bag space is freeing itself up lately -- it's an "everything must go" sale on the AH for me as I try to convert all my soon-to-be obsolete crafting items into gold.