Passenger lists: Where do I find them?

There are passenger lists scattered around the internet. Here are some of my favorite sites. They are all free (but registration is required for some of them), and they all have passenger lists of ships from Holland to the new world.

• Ellis Island. Registration is required to view scanned passenger lists.
• Castle Garden, America's first official immigration centre and Ellis Island's predecessor.
• National Archives of Australia record search. Their database includes passenger lists and immigration papers (only for arrivals in Australia, of course). If there is no scan of the record you want, you can order to have it scanned (for a small fee). Once the scan is available, it is freely accessible for everyone.
• Passenger lists before 1736 and passenger lists after 1736, an index to passenger lists on Digital Resources Netherlands and Belgium. Here, you will find links to many more passenger lists for ships carrying Dutch emigrants.
• Ships Passenger Lists to New Netherland, New York 1624 to 1664, on The Olive Tree Genealogy. While you're there, also check out the Dutch Immigration to USA & Canada section.
• The website of the Immigrant Ships Transcribers Guild (ISTG), an organisation of volunteers transcribing passenger lists. They were founded in September 1998, so their tenth birthday is this month!
• Ships' Passenger Lists on On the Trail of Our Ancestors. The Dutch Research Corner on the same website seems to be somewhat outdated.
• The many passenger lists in the USGenWeb Archives.
• Immigrant Ships, on Macatawa Bay Area History & Heritage - a website about the history of West Michigan. From browsing this site I get the impression that everyone in this area has Dutch roots!
• There are several passenger lists on the website of Herman de Wit.