AQIM/GSPC attack patterns
We have not been feeding the terror nerds properly of late. They are stirring in their chains.
Via Jihadica, I found this impressively detailed study of attack patterns in Algeria, published by Hanna Rogan in the CTC Sentinel (PDF) in late 2008. It analyzes trends in attacks carried out by the GSPC (now al-Qaida in the Islamic Maghreb) from 2001 into 2008, and should be enough to chew on for a while.