Can you clarify, are your lists intended to be sender domain lists or message body URI lists:
What is rhs.mailpolice.com?
MailPoliceTM maintains a domain-based list of domains which have been (ab)used to send spam to our customers. There are currently several domain-based lists: one which lists bulk mail senders and unsolicited advertisers; pornographic e-mailers and websites; reverse DNS hostnames of dynamic Internet connections; websites and IP's hosting fraudulant or phishing content; legitimate e-mail marketers and opt-in advertisers; and domains used by webmail providers.
What is the point of a domain-based list? what's wrong with an ip-rbl?
Judging e-mail based on the MAIL-FROM or hostname of the connecting mail server or websites advertised within an e-mail, is effective. Many unsolicited e-mailers regularly buy domains for the sole purpose of spam. No matter where the spam is sent from, it can be blocked based on the senders' domain name, or the domain name used in advertising URLs in the body of the e-mail.
Blocking based on IP address is effective only as long as the spammer continues to send from these IP addresses, it does not take into consideration that spammers can quickly move to another set of IP addresses, or use unlisted proxies.
Using a combination of domain-based and IP-based blacklists is an effective weapon against spam.
It sounds from the description that your RHS lists are sender domains as opposed to message body URI domains as we use with SURBLs.
That said, I can see how Bill may have found some overlap with message body URIs.
Jeff C.