You can search for New York passenger arrivals here from 1892-1924. There are approximately 22 million total records. Keep trying or try later if you get an error message -- this site gets heavy traffic. The site was opened on 17 April 2001.

While here in New York this morning, I'm going to head over to Ellis Island to do some more genealogy research. I just learned at my family reunion last week that some of my own ancestors (a set of great-grandparents and their children) did indeed come to the U.S. through Ellis Island. I have no idea if I'll find anything on them or not, but I figure it's worth a try....

Ellis Island Online Database 1892-1924 | Information & Research Tips