I'd just like to say that I am amazed that this forum isn't promoted more as an example of the power of Phalcon. It would make a great tutorial series on a basic level.
Are there plans to update Phosphorum to Phalcon 4?
Either way, I think you are missing an audience by not promoting Phosphorum more. Many PHP frameworks have attempted their own forum and most have failed, but the fact that you are using it as the official Phalcon forum is a sign of confidence that should be discussed more. But that's just my opinion :)