The Sasquatch

Ok, so, I've got these two friends, a couple, who are heading to Ireland in like a week and I don't think they have any idea what they're gonna do. I think they have between 10-14 days there. I told them I would try to figure something out for them, but I've never been, and have never had that much interest in the country so I have NO IDEA. I figured here would be my best bet. The best thing for them would probly be a quick tour, like a week or so, but would any tours be starting during the christmas/new years season? I don't even know what's there for them to see. All i really know of are the cliffs of moher(which look amazing) and like, blarney castle and the blarney stone. I think they'd be most interested in castles and stuff of that nature. anybody help me out with this? i tried to do a bit of a search, but its like 6am and i can't be arsed. i'm gonna go look for a lonely planet for them tomorrow, but was hopin to get some first hand knowledge here. cheers, wally