The copy service seems to want to take an item from one source url to another. I looked in the list service but nothing jumped out at me as an option. Can someone point me in the right direction?
You'd use the Lists web service, the UpdateListItems method wouldn't you? "The Lists Web service provides methods for working with SharePoint lists, content types, list items, and files." http://msdn.microsoft.com/en-us/library/lists.lists%28v=office.12%29