The Value Suites - Nemo and Cars are booking now, and plan to open May 31st.
The Lion King Suites will open in October, and the single Little Mermaid rooms will open in December.
I'm not quite sure whether you're asking about the Suites or the Single Double Bed Rooms.
I guess the best way for us to learn is when someone goes online or on the telephone to book it. Their response will tell us what is & what isn't open.
We're staying in a Nemo Suite in August (2012). We booked it in January.