hello
if you do a search on some sites for major airlines some will state they cant advertise that far ahead, last week i answerred a post about flights to the states. i always came across words to the effect that they could not provide details 341 days ahead (something like that) i searched for dept. end of may 2008, no joy.
i expect they have their schedule for summer 2007 and winter/spring 2008.
i would wait until september still plenty of time. saying that if you want to book now you can get some quotes from airlines now you can.
regards jim