My favourite way to cook green beans is to fry them in oil until their outer skin blisters and they turn impossibly sweet. Snake beans are no exception and can be fried (almost deep fried) in batches. Add some slivers of garlic and these beans really come alive.
Keep the beans long as they look lovely "snaked" around a plate, but trim them to a size manageable during the cooking process.
Also see the post "Chinese style Fried Blistered Beans".