Paul Trevithick let me know that the notes from the i-card session at the Berkman Identity Open Space last month are posted at http://wiki.idmashup.org/I-cards.

I continue to find it very helpful to make the distinction between address-based identity and card-based identity. It helps me gives much shorter and more understandable answers to questions like “What’s the difference between an i-card and an i-name?”

It also makes it much easier to talk about how an identity framework like Higgins will work with both forms of identity. Paul’s understood this intuitively all along, which is why he’s been creating a pluggable framework to help developers write identity-empowered applications, no matter whether the underlying systems/protocols are address-based or card-based.