Sure, happy to!
Efficient IP allows you to drop custom code called "rules", which basically define functions that are called as event handlers. One ours, we have a pair of rules, one that is triggered when a registration is created or updated, and one that is triggered when one is deleted.
The create/modify rule, when called, just gathers up information about the registration, most notably hostname and MAC address, and wraps it up into a REST call that gets sent to Clearpass. It also includes a custom variable, in our case called IPAM-AdminStatus, set to a default value of 'OK'.
Later, in role mappings and/or enforcement policies, you can test for the presence of that custom attribute to go down different paths whether or not the device is known. In our case, we also go one step further and can set it to other values like 'suspended', which indicate to clearpass that it should drop the device in a captive portal VLAN for remediation of some kind.
I don't really know InfoBlox well, but obviously you'd need the ability to add those custom event handlers in for this system to be viable. But if you can, this might be one way to create the linkage between Clearpass and your IPAM system. It's definitely worked very well for us.