I ordered two of these earlier today using a helpful work colleague's address in Northern Ireland for £68.50 each. I have already picked up all the pirates sets in the US in December and will acquire other sets in Northern Ireland when they start to appear in shops (e.g. Argos, where online reservations are possible or Smyths where they have an in-stock guarantee system). Interestingly enough the total postage to Northern Ireland is only £5.50 whereas the euro postage to ROI is over €14. Bring on sterling parity.
Eventually I think that a weak sterling might have some impact on UK prices as the sets aren't made in the UK and it surely costs more in sterling terms to import the sets. Only adverse market conditions will keep the prices down - but then again poor economic conditions have not stopped lego trying to fleece Irish customers interested in 10193.