I'm also interested so if anyone has been able to get hold of it and might be willing to share it, that would be fantastic. By the way it looks like ProDG 4.70 is already floating around the internets.
Both this and the 4.50 PS4 SDK were made available elsewhere last weekend. I'm sure they're easy to find with a quick Google search, but I wouldn't know since I would never download such a thing.
and the actual links shared are taken down by Sony in the fastest time. Dang =( I understand that the latest firmware for the DECR and DEX was also included in the SDK~