Definitely get her out to Galway Bay, County Cork and such. - Cliffs of Moher in County Clare. - Transportation is fairly easy and the people are extremely friendly, just as the stereotype goes. - She's going with a friend I hope? - Dublin is a wonderful, dirty old town, but definitely had a more modern feel, especially with all the new construction.
It's a shame you can't go, man. It's a beautiful island.
Have her hit the Temple Bar as soon as she gets in Dublin. It's not a specific bar, but sort of a courtyard area where tons of stuff goes on. It's a lot of fun.
Slainte!