Open Relay Database (ORDB.ORG) is shutting down

One of my favorite real-time block lists (RBLs) is shutting down. This is from their web site:
"We regret to inform you that ORDB.org, at the ripe age of five and ahalf, is shutting down. It's been a case of a long goodbye as verylittle work has gone into maintaining ORDB for a while. Our volunteerstaff has been pre-occupied with other aspects of their lives. Inaddition, the general consensus within the team is that open relay RBLsare no longer the most effective way of preventing spam from enteringyour network as spammers have changed tactics in recent years, as havethe anti-spam community." Read more...