This is the web page of a group dedicated to transcribing ships passenger lists as faithfully as possible. They already have over 400 lists posted. Check it out.
Scots Irish Immigration of the 1700s
Here's a site to check out if you, like many of us southerners, have
This site is a discussion of the Scots Irish immigration of the 1700s...why it happened, what are some of the pressures that got the people to leave the UK, etc.
By the Dawn's Early Light: Ulster Emigration to Freedom and the New World in the Eighteenth Century
Here is an article about the Scots-Irish, also known as the Ulster Scots and the Scotch Irish, and their immigration into America in the 1700s...This is from a site dedicated to the history of the Ulster Scots, both in the UK and elsewhere.
This is a searchable by initial of last name list of names, ships, dates of people of mostly Irish and Scots Irish background...many from the height of the Irish immigration, but some I saw were fairly early, too. A good place to start looking.
Another Ships list link for those looking for their immigrant ancestors: This one has lots of links.