Whilst it still says "Summer" (as opposed to originally June ) on theweb site, a friend of mine phoned up yesterday and was told that they now expect to start flights in September!
However you can "book" in July on the web, but they did say to her they were not taking payments, just collecting the bookings, so if the deadline for your flights is missed, you dont lose any money!
they said things were going slower than they expected.