Hi, Gareth!
While there is no official word as of yet regarding when the fabulous
California Grill will reopen atop Disney's Contemporary Resort, there are several places where Guests can keep an unofficial eye on things.
According to
Disney Parks Blog, California Grill is set to open in late summer, so you may be able to secure a reservation for your upcoming trip in late September. Rest assured, this will be one hot ticket, so keep your eyes on multiple sites for announcements of when Advanced Dining Reservations will be available.
Some favorite unofficial sources of Walt Disney World news include Disney Food Blog.com and All Ears.net, both of which are keeping fans posted with sneak peeks of new dishes, artist renderings of the new design and updates, when available.
Again, keep an eye on all four of these sources so that you'll be among the first to know (and ready to book!) when California Grill once again is able to take reservations.
Good luck!