There are some very rare reports that the FBI uses an ALE based network; there's also the SHARES network which is much more often reported - especially after major disasters - and I understand they have a net that is tested at least once a week. Then there's the COTHEN network, for which there's a dedicated Yahoo group. Again keep your eyes on the Utility DXers Forum on Yahoo - do some well constructed searches from the group's home page and see what develops. Immigration and Customs Enforcement uses the COTHEN network, and other agencies, too.
I know the wiki has links for ICE, and ALE networks. The SHARES nets can be found in the Hurricane lists from Hugh Stegman. Just click on the 'Utility Monitoring' text in the previous message. Between that, the 2 blogs mentioned earlier and the UDXF, you should be able to build a good start on monitoring the Feds on HF. I'd also read the wiki article on monitoring the military - there's a link there for a basic propagation website that you should read. Understanding propagation on HF is a key to being successful in finding what you look for - no matter what the indivdiual topic - on HF.
As I recall, George F was sent to jail for selling XBoxes he never delivered. I don't know whether he has since gotten out; prior to this I tried sending him EMails with data to update his site but he never responded.
73s Mike