Chia seeds are available at health-food stores and online. They're rich in omega-3s, fiber, and antioxidants.
Place chia seeds and vanilla pod in a medium mixing bowl, and set aside.
Drain cashews, and rinse well. Add cashews, filtered water, the dates, salt, cinnamon, coconut butter, vanilla extract, and vanilla seeds to a blender. Blend on high speed for 2 minutes, and pour into bowl with chia seeds and vanilla pod; whisk well. Let mixture stand for 10 to 15 minutes, whisking every few minutes to prevent chia seeds from clumping (pudding will thicken quickly). Refrigerate until cold, about 3 hours.
Discard vanilla pod. Whisk pudding. Divide pudding among 8 bowls. Top each with berries, and drizzle with maple syrup.
Pudding can be refrigerated in a covered glass container for up to 5 days.