The advantages of a shared online Rolodex seem to be quite obvious as the idea has spread more and more in recent years. An online application of this sort allows people to save their contacts by name and by any other details they see fit to save about them. Easy to operate, simple and fast, many people see the shared online type of Rolodex as an answer to contact management.

It would most likely allow you to have notepads and to add notepad info to every contact. One can store an unlimited number of contacts and there would no longer be any need to carry those cards around.