I support Leonardo's comment, unfortunately there is no exact date but it will be in 2014. You can already move to Yocto and there is a community to help you (Leonardo being one of the guys that knows more about yocto here)
I am not sure about the date. However, no matter what the date is, I suggest that you move to Yocto. There are many reason, but perhaps the most important is that the project is alive so there is a community to help you.