This is deja-vu! I had a May trip last year (and have one planned the first weekend in May this year), and I remember the same problem. If I recall correctly, the "official" hours didn't come out until April, but people started getting them by calling Disney near the end of March/beginning of April. So, not only are all the people in this thread in the same boat, it's the same boat we were in last year!
P.S. - even after they finally post the hours, they can be changed at the last minute, so keep checking up to and including the morning you enter the parks.