Update: This service has been discontinued. Links deleted below.
I highly recommend subscribing to the Department of Homeland Security (DHS) Daily Cyber Report. I included a link below which will craft the subscriptions email for you. Just press send and you'll recieve really good OSINT reports from DHS.
There are several other reports available:
Other DHS Open Source reports that are available for subscription....
Daily Homeland Security Digest
Daily Infectious Diseases Report
Daily Drug Trafficking and Smuggling Report
Daily Human Trafficking and Smuggling Report
Daily Terrorism Report
Weekly Weapons and Munitions Report
Weekly Illicit Commercial Goods Report