Quick update on this: the procurement guys from JDW were over this last couple of days and Reuben and I met them briefly yesterday.
Basically, they want to do here exactly what they do in the UK: cheap beer, cask beer, local beer. Local food too. But they're at the very beginning of the process so they don't know how it'll actually pan out, who will do business with them, and what will be on offer when the doors open. Shipping beer over from the UK seems to be a last resort option if they can't source what they want here.
The property search is ongoing, they're definitely looking for about 30 places and in Dublin have been looking in the city centre as well as the suburbs.