Things have moved fast since I wrote that document.
Cloudmark has announced
http://rating.cloudmark.com/senderid/ (a domain-name-based
reputation service) and Verisign has announced its VDL (a
first approximation to domain-name-based accreditation).
Please also don't forget ISIPP's IDDB (ISIPP Domain Database) which
presently lists domains (both top level alone, and with subdomain) and
both declares the only IP addresses through which mail from that domain
may properly issue, and cross-references to the IADB and IADB data
(making it also true domain-name-based accreditation).
Anne