Working Around Slow US Gov. On DNS Security
alphadogg writes "Last fall, the US government sought comments from industry about how better to secure the Internet by deploying DNSSEC on the root zone. But it hasn't taken action since then. Internet policy experts anticipate further delays because the Obama Administration hasn't appointed a Secretary of Commerce yet, the position that oversees Internet addressing issues. Meanwhile, the Internet engineering community is forging ahead with a stopgap to allow DNSSEC deployment without the DNS root zone being signed. Known as a Trust Anchor Repository, the alternative was announced by ICANN last week and has been in testing since October."
You may be a layman, but you appear to have far more clue about this stuff than most. Yes, once DNSSEC is deployed, anyone with a domain name can publish CERT records and have about the same security as a paid-for CERT. Granted the cert authorities right now require you to give your name and address and such, which publishing CERT records in the DNS won't require so they aren't exactly the same, but close enough considering how little checking the cert authorities do on such information
SPF support for most open source mail servers can be found at libspf2.
Signed zone data is not reliant on x509 certificates; algorithms defined in RFC 4034 are RSA/MD5, Diffie-Hellman, DSA/SHA-1, Elliptic Curve, RSA/SHA-1, and room for ~245 future algorithms. There is no identity information stored in the keys used for DNSSEC, so you should be able to generate the keys yourself.