Possibly the swiftest route to your roots.
Irish genealogy website directory.
sites.google.com/site/irishgleanings/home
Description:
"I've have been researching the US State Department records at the US National Archives. I've gleaned information on the place of birth for hundreds of Irish migrants. Typically this information will connect a person with a location in Ireland to their residence, or former residence in the United States. Some of these Irish migrants return to Ireland to live and raise their family. If you find any names that connect with your research please send me an email."