Here's a reply for an email I sent last weekend...
Thank you for your inquiry into the new T-Rex Orlando! At this time our restaurant is scheduled to open in November of 2008 and we do not have a set date yet for taking reservations. You may check our website at anytime for updates on our opening. If you are in the Disney area and are looking for a WILD time, call one of our Rainforest Café properties for a priority seating. We have one located at the entrance to Disneys Animal Kingdom Theme Park which you can reach at 407-938-9100 and one at Downtown Disney Marketplace (a block away from our new T-Rex site) which can be reached at 407-827-8500.
Thank you again for your e-mail and we look forward to your visit!