News of the seizure of at least four ships this week by Somali pirates has some scratching their heads. Pirates? Those still exist? They may not have peg legs and eyepatches, but roving bands of fishermen-turned-renegades are patrolling Somali waters, ostensibly as a makeshift coast guard. What's really going on in the Gulf of Aden? It's time for Somali Pirates 101.