First use the Travel Agents calender to find the dates Fantasmic is showing.
Then go onto the disney website and pick Special Events (dining is the button that is automatically selected) Then choose Fantasmic DP as your drop down option. Then go over to the date and type in the date 10/02/2011 (you must type it like I did, but use the date you want). Then select a time for your meal. It will bring up all the restaurants that have availability around the time you selected.
If you wait for Disney to add the dates into the calendar, all the Fantasmic DP will be gone!