Moving is rarely painless, even in the brave new world of cyberspace. Changing your web site's Internet address can lead to all sorts of confusion. You need to ask known contacts to use the new address, and hope that others will eventually stumble onto it themselves. But if you rely on the Internet, moves are bound to generate at least as much confusion as an address change in the real world.
Unfortunately, such site relocations are often unavoidable. Both Internet Service Providers (ISPs) and server machines come and go over the years. Moreover, some ISPs let their service fall to intolerably low levels; if you are unlucky enough to have signed up with such an ISP, there is not much recourse but to change providers, and that often implies a change of web addresses.[*]