You can add the Balkan criminal enterprises, especially the Albanians. Increasingly, Asian criminal enterprises are not directly related to the traditional Triads. The Yakuza has relatively little presence in the U.S. Of course "Russian" criminal enterprises is often an umbrella term to refer to all Eurasian groups, i.e. both Russian and Eastern European. There's also Nigerian and Middle Eastern criminal enterprises.

You'll notice I'm using the term "criminal enterprises," as opposed to "organized crime." Even though these terms can often be used interchangeably, the FBI also differentiates between them a lot; especially when comparing La Cosa Nostra to the newer ethnic groups.

And let's not forget all the Mexican and South American drug groups. Colombians, Mexicans, Dominicans, Cubans, etc. They're often categorized differently, because they're usually involved only in drugs for the most part, but there's no denying they are also organized crime.

I should also add that even some black and Hispanic street gangs have become sophisticated enough, at times, to warrant the label "organized crime" or "criminal enterprise." It's why the Justice Department combined it's OC and Gang unit a while back.