Fantasmic Buffet?

[Tedi Bara]

How hard is it to get buffet seating if you call 30 days prior?

[disneychrista]

They sell out by 8:02am. So you better call starting prior to that. And keep trying, for each day of your stay.

[Sweetie]

Disneychrista is right, they sell out almost INSTANTLY!
What I did was call a minute before and then kept redialing until I got through.
Then I said "Fantasmic Dessert Buffet" and the date, time and number of people and credit card number.
I found that if you speak fast with a sense of urgency they type fast. If you give them a pleasant "good morning" they type slow and you wont get in.
So, my advice is to be a bit rude and apoligize after you get in!