Sarrah from Sylvia's FAQ: "To avoid what happened with the shuffling of Entwined with You’s release date, we’re going to refrain from announcing a date until the book is in production and everything is Set. In. Stone. You’ve seen something like this recently with the release of Dan Brown’s Inferno–it was announced in mid-January and in readers’ hands mid-May." Also, it looks like she's on tour in Brazil from the end of August through the beginning of September, so I'm guessing she's tied up for a few weeks more anyway.