I wrote 3 scripts in php that require your server have pear dnsbl installed.
Scripts 1 & 2 allow manual entry (ie. script one single ip, script 2 up to 10 ips) Script 3 pulls from a txt file and displays results in green or red; if red has url with pre-filled in ip address to mxtoolbox(for now) so you can see which SBL's you are listed on. Works great. I'm just working on a email component of it. I'm going to offer it on my web site for free once I finish it. Unless someone here is a php developer and can help me out. Message me if this is the case. I just know I am tired of over priced monitoring services and I'm an opensource guy my self.