To the best of my recollection, here is the information that was sent to a poster by T-Rex:
The Orlando T-Rex will not take the regular or deluxe dining plan.
It will accept the premium and platinum plans, and Wine and Dine.
You will not be able to call and book a reservation until sometime in January.
T-Rex will not take reservations through the Disney system. They must be contacted directly (same procedure as Rainforest Cafe at DTD - only the AK RFC takes reservations through Disney).