Run Your Own Massive Distributed Honeypot System
threatstream.github.io
threatstream.github.io
I've had really good results at Kiva with Project Honeypot and http:bL but have also implemented a local management for whitelisting/blacklisting IPs to work around what it misses or is overzealous on.
If you use more interesting honeypot software like Conpot you can monitor which countries are attacking SCADA systems, etc.