TeleFan76: Isn't the annv sale usually around the end of September? So unless it's being delayed because a big release i don't think it's happening this year.
From my research, GOG always had an Anniversary every year. It is usually in September but they had one in Oct and Nov before. I have a strong gut feeling that they will have one this year as well. I personally would like to see one happen soon so I can casually give away some greatly anticipated games.