Possibly the swiftest route to your roots.
Irish genealogy website directory.
www.ellisisland.org/
Description:
The Ellis Island site is geared more for genealogists searching for a particular person rather than focusing on the immigration experience as a whole. While Ellis Island was only open from 1892 to 1924, this site does explore the experiences of immigrants before and after this time. This site features modern day stories as well as a timeline with statistics of the different immigrant groups.