Ireland is an interesting place to visit, especially with the media speculating that he's there because he's Irish on his mother's side. This is doubtful, considering our prez calls himself "black", thereby denying all of his white heritage.
A much more likely explanation for the visit is Ireland's finances. Ireland's leaders have failed them, destroying their economy with bad fiscal policies and overspending. Obama's doing everything he can to see that we fail in a similar manner ($1.3 trillion dollars per year in deficit spending), so he's going to Ireland to learn from the experts on how to properly kill an economy.