An employee at my local Nike Town pulled the blue flyknit airmax out of the back room to show me last weekend. I think he said this or next week they will be released. If you look at the regular airmax 2014 , they initially came out in 3 colors and in a few weeks 4-5 other colors were released. So I expect new colors (both the blue and grey) to come out soon.
I have both the AirMax 2014 Gammas and the Flyknit Airmax 2014 Black/Orange/Volt. They both are great for running but I really worried about getting the gamma dirty. I might just use it to walk around in. Hopefully the new Flyknit Lunars drop soon.