When installing DM on Snow Leopard, I choose the multiple pc option. When I sync everything seems to go fine, except EVERYTHING gets duplicated. Contacts, calendar items...etc. Frustrating, but it is their first attempt. Should give them credit for even trying. I would also like to know the mapping and if its adjustable. It may be partly my fault as my main pc is my Ubuntu desktop. The options of syncing in linux are even less! I also would like to be able to bluetooth sync to either or both. Pipe dreams.