I don't yet know everything that it is doing, but Sxipper is definitely cool and slick.
From what I see, I'd describe it as a client-side OpenID persona manager, simplifying for users the choice and use of different personnas at different sites. Sxipper also stores profile data, and form fills as appropriate. There are hints that it does some cool 'semantic maps' for forms, somehow my actions on a form (but not data?) are recorded and aggregated for good of commmunity?
Kind of similar to the Cardspace model. A request from an SP for an OpenID wakes up Sxipper, which then prompts user to choose an appropriate persona. Blurs the supposed distinction between card-based and URI-based identity.
I'm confused by the OpenID demo though.How did Sxip determine that my wife calls me "joesixpack"? Is appending 'et' designed to inhibit correlation?