Looks like the summer update for Sync will be making its way out soon. Here is a photo posted by Scott Monty, Social Media guru for Ford, after updating his wife's Explorer:
https://www.facebook.com/photo.php?fbid=10151485142761625&set=pcb.10151485144571625&type=1&theater
When asked whether or not it was available now he replied "it's making its way out. I received mine in the mail today. It's an upgrade and improvement"