Several of us have posted links to the German rail system. Check out page 6 or 7 of the Altbier topic. You should be able to get the schedule and fare information about IC trains which run between countries. There should be regular direct train services from Amsterdam central station into Germany, and Dusseldorf would be one of the first major cities the Amsterdam to Frankfurt service would stop at. There are frequent trains between AMS and the central station. See you there.
[This message has been edited by Shareholder (edited 09-27-2000).]