I was thinking we might possibly know the title of Episode VII by the Holidays this year. The title to Episode I was publicly revealed for the first time in late 1997, Episode II's was made known towards the end of 2000 around the time of the Bush-Gore rigamarole and Episode III's moniker was slipped to the press by Lucas and his people in the closing months of 2003. All three episode titles were disclosed roughly eighteen months before the films hit cinemas.
That's no guarantee that Episode VII's name reveal will follow the same or even a similar pattern, but it's possible based on the previous track record that the title might become public knowledge before Christmas of this year to help stir excitement. I guess it's all up to Disney and how long they want to keep the newest story - even its title - under wraps.