Accommodation for Barcamp
I tried Jurys Hotel as recommended on the Barcamp Ireland Web page to no avail, they said no rooms available. I then tried to book the same hotel using gtahotels.com and got a choice of several hotels in Cork, including the Jurys Inn. The booking was 3 euros cheaper than the price quoted on the Jurys Hotel page to boot.
However be warned, your card is debited when you make the booking.