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.

http://iigs.rootsweb.com/immships/index1.html
 
 Scots Irish Immigration of the 1700s

Here's a site to check out if you, like many of us southerners, have Scots-Irish roots.
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.

http://www.zekes.com/~dspidell/ulster.html

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.

http://www.aughrim.demon.co.uk/bdel.html
 

Irish Immigrants

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.

http://genealogy.org/~ajmorris/ireland/ireemg1.htm
 

Immigrant Ships

Another Ships list link for those looking for their immigrant ancestors: This one has lots of links.

http://www.fortunecity.com/littleitaly/amalfi/13/ships.htm