I think this is just old. Some obvious missing ones for the U.S. (any background I've provided is personal conjecture):
* The palm-outward vee has meant "peace" since at least the 1960's, and was associated with anti-Vietnam protests and the Hippie movement.
* 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.
* 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).
* The palm-outward vee has meant "peace" since at least the 1960's, and was associated with anti-Vietnam protests and the Hippie movement.
* 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.
* 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).