I think this is just old.  Some obvious missing ones for the U.S. (any background I've provided is personal conjecture):<p>* The palm-outward vee has meant "peace" since at least the 1960's, and was associated with anti-Vietnam protests and the Hippie movement.<p>* The vee palm-in and tilted to the side also means "peace" or likely "peace out" or "see you later".  Around since probably the mid-to-late 1990's and associated with hip-hop culture.<p>* The index and pinky outstretched is the "rock horns" (symbolizing demons or the devil), which you would use to mean "awesome" or "bad-ass".  Around since the rise of heavy metal music (late 70's, early 80's).