There a new ISO images for FAI available. They use FAI 5.3.6 and Debian 9 (aka stretch) and kernel 4.9 for installing Debian, CentOS or Ubuntu onto your machine.
The ISO images can be for for by a CD or USB stick. You can also install your own FAI install server using this CD. There are three different flavor available, a small one (only including packages for XFCE), a large one including XFCE and GNOME packages, and a Ubuntu only edition. Additionally, there's the very small autodiscover ISO, which can be used after you've set up your own install server. All ISO images for Debian 9 are available at http://fai-project.org/fai-cd/ I still provide the old ISO images for Debian 8 (aka jessie) at http://fai-project.org/fai-cd-jessie/ -- regards Thomas