I am told that this is not the best way to do this.
( 	Here are a few links to get you started...
		http://www.corpit.ru/mjt/rbldnsd.html
	 	http://www.surbl.org/setup-local-rbl-mirror
	 	http://www.surbl.org/surbl-nameserver-setup
)
But,It works for me and I don't fix what ain't broke!

I looked all over the Internet for this and only found how to make a local copy of an 
existing Blacklist server.

My Postfix/Amavisd/Spamassassin/ClamAV Servers (mainly FCx and Ubuntu)
run their own caching DNS server that they query first.
(/etc/resolv.conf points to 127.0.0.1 first)

I added a master zone file in /var/named/chroot/var/named/zonename.example.com.hosts
(my example on Ubuntu 11.04: /etc/bind/firewall.my-webz.net.hosts)
containing something like this:
	$ttl 38400
	zonename.example.com.	IN	SOA	hostname.example.com. hostmaster.example.com. (
			1208053634
			10800
			3600
			604800
			38400 )
	zonename.example.com.	IN	NS	hostname.example.com.
	zonename.example.com.	IN	A	192.168.1.1
	webspammerdomain.com.zonename.example.com.	IN		TXT		"Bad com"

	... hundreds more...
	
I add a zone record in /var/named/chroot/var/named/named.conf
                   (or /etc/bind/named.conf -chg file root)
	zone "zonename.example.com" {
	type master;
	file "/var/named/zonename.example.com.hosts";
	};

I stopped and started named/bind

I add to /etc/mail/spamassassin/local.cf (/etc/spamassassin/local.cf)
	# run local uribl
	ifplugin Mail::SpamAasassin::Plugin::URIDNSBL
	urirhsbl	URIBL_MW_SURBL	zonename.example.com.	TXT
	body		URIBL_MW_SURBL	eval:check_uridnsbl('URIBL_MW_SURBL')
	describe	URIBL_MW_SURBL	Contains an URL listed in the MW_SURBL blocklist
	score		URIBL_MW_SURBL	7
	endif

I reloaded amavisd and it worked!

(Adjust DNS SOA to fit and change zonename and example.com to something you control.) 

Actually, I commented out the ifplugin and endif lines above because I thought they weren't working 
correctly when I first installed it. Since I knew the plugin was there, it didn't matter in my situation.


I keep my URI's in an Access Database. I have written asp pages to display and maintain these entries.
I have a perl script that extracts this table into a bind zone file. 
I also, have a perl script that will add to this table from a list of domains in a batch file. 
I automate the updating of my servers by posting my changes to an internal ftp site where 
my servers periodically looks for and process any change files.