This used only to have one key, but things are slightly more complex at the
moment. Our OLD KEY expired in July 2008,
but it's the one whose fingerprint and ID are on our business cards. There
are quite a few of those out in the wild, and I don't intend to reprint
them until the old ones are used up.
But our NEW KEY is the one used to sign all
invoices, effective 1.7.2008 (signing date). This key is signed with the
So if you're just here to get the invoice-signing key, and you either don't
care about authenticating the key or already have a trusted copy of
our old key, you just need the NEW
KEY. If you want to authenticate our new key, and you have a business
card, then at the moment you need the OLD KEY
Hope that's clear.