I keep thinking about publishing it, but I have a script which takes a Raspberry Pi SD card image, extracts it, modifies it (mostly by automatically editing cmd

I keep thinking about publishing it, but I have a script which takes a Raspberry Pi SD card image, extracts it, modifies it (mostly by automatically editing cmdline.txt and fstab) to be suitable for network booting, and then pushes it to my netboot server. This way I can quickly boot any Pi in my house (and there are quite a few now) to any arbitrary OS image just by renaming a symlink on the server.