Most of today's sites require users to undertake a registration process to allow the site owners to keep in touch with, or offer services to, those visitors. Building up a user base like this requires patience and dedication. Offer a new service or a new Website, however, and, typically, you'll need to start your user base from scratch yet again. This article outlines a strategy for creating portable membership tools. We'll see how Web Services and server controls give you ability to produce a single sign-in for all your sites and resources.
