Castlepalooza has been announced for 2013, taking place in Charleville Castle Tullamore August 2nd, 3rd & 4th.
No line-up announced yet but
early bird tickets are on sale for €59.
I've never been to it myself but hoping to go this year. I've heard its a good chilled-out small festival, perfect escape from a hectic August bank-holiday weekend. €59 early-bird is hard to beat too!