CACert is a non-evil X.509 certificate authority based in Australia.
They give out free certificates to people whose identities they can
verify, and they way they verify identities involves a web of trust.
I met the CACert people in a meeting in the US last year, and they
verified my identity in appropriately paranoid fashion, and made me an
Assurer. That means I can act as an introducer.
If any of this rings bells, and there's someone at the meeting who
would like to be "assured", flag me down at some point and It Will Be
Done.
Joe