IX was formerly (and perhaps still) an activity of ARDA (ic-arda.org) rather than DARPA. But it appears this new DARPA office will address similar technical issues, although perhaps for different applications.

"The Information Exploitation Office (IXO) develops sensor and information system technology and systems with application to battle space awareness, targeting, command and control, and the supporting infrastructure required to address land-based threats in a dynamic, closed-loop process. IXO leverages ongoing DARPA efforts in sensors, sensor exploitation, information management, and command and control, and addresses systemic challenges associated with performing surface target interdiction in environments that require very high combat identification confidence and an associated low likelihood for inadvertent collateral damage.

Site under construction."

Check back for more details, and expect a few BAAs to be posted soon.