I'm interested in a "free" CA. But thawte doesn't seem to be one. "Thawte Developer Certificates allow you to sign your code and macros for secure delivery over the internet." => $200 down plus $100 per year.

Searching more, I see they have "Personal Certificates" for free, which just allow signing of email.

Looks like they also have a "web of trust" thing with is the same as PGP's concept.

--mdash;John