Just went to Playstation Store's section on Absolution. No demo, but surprisingly the preorder DLC is available, at least here in Sweden. The preorder suits and guns, plus a Deus Ex suit and a Deus Ex 'Zenith' Handgun can be bought as a Suit and Gun Collection. The guns from the Agency Gun Pack DLC, the Agency Jagd, etc., can also be bought individually. Don't know if they're available on Xbox or other Playstation Stores.