"America Online is quietly rolling out a new unified sign-in service, similar to Microsoft’s Passport, across its properties and partner sites. Codenamed "Magic Carpet" and currently promoted as the "Screen Name Service," visitors will be able to sign in with a single click and seamlessly browse sites supporting the new technology. Additionally, the service will be compatible with AOL, AOL Instant Messenger, and CompuServe 2000 accounts."
12/03/02 update: [BetaNews] AOL Pulls Rug From Under ‘Magic Carpet’.