Tony Campbell writes: www.academia.edu is the researchers' equivalent of LinkedIn. Almost 22 million people have signed up covering many disciplines. There are over 3000 people for the history of cartography and its well worth a visit or even to join - to upload papers, talks etc. and of course to download them. If you join a research interest group you are automatically in contact, if you wish, with others in the same field and can receive alerts as to new publications etc.come out. There are many more uses.
websites for historians of cartography