Logging into Facebook provides access to a variety of other content sites like Digg and Citysearch, with Facebook Connect serving as a single sign-on ID.
Facebook aimed for greater utility with its logins and unveiled a new feature called Facebook Connect. It's being touted as an OpenID killer in the single sign-on space. The concept of single sign-on removes the multiple logins and passwords people use across various web services. By signing into one place, in this case Facebook, that authenticated login serves to provide entry into other sites supporting Facebook Connect. In doing that, a Facebook user shares their activity with friends who see that Mini-Feed activity. The appeal to brand advertisers becomes obvious: a mostly youthful, college-educated audience, with money to burn. Enabling a single sign-on removes one barrier for someone new to a brand name site; they will already have access to that site's features normally available through registration, a process some people find annoying. In one example,Suggest a Correction
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