Does anyone know if  a formula that will calculate the number of items selected on a multiselect picklist field?  Example If the the multiselect field was: What are your favorite pizza toppings? And the user selects Cheese, Mushrooms and Sausage from the 45 options on the multiselect picklist.  What would the formula be for the formula field to calculate the number 3 since 3 items were selected?