In a medium saucepan, combine the cooked rice, vanilla soy milk, and coconut milk.
Place over low heat.
Bring the mixture to a very low simmer, stirring occasionally, for about 10 minutes, or until it begins to thicken.
Stir in the maple syrup, agave nectar, and chopped dates.
Continue to heat for another 2-3 minutes, allowing the flavors to meld.
Remove the saucepan from the heat and let the pudding cool for at least 10-15 minutes. It will continue to thicken as it cools.
Serve warm or chilled, garnished with fresh chopped mango and an extra dash of cinnamon.