We then proceeded to discuss how it's sad that identity is still hard online.
Couldn't this be solved, at least for the tech-savvy crowd, by beeing able to sign an openID-account with a PGP-Signature? This way you could "prove" that your openID belongs to you, the same way you can prove the authenticity of an email right now.
The problem with this is that openID is no fun right now and the last thing that is needed is more complexity. But at least Jeff would be able to know whether or not Alan Kay really posted on his page.