I have created the galileo-debian project on sourceforge.net for the purpose of providing a place to collaborate on maintaining a Debian image for the Galileo Board. The project contains a SD card image ready to be downloaded and used, plus an apt-able package repository providing a place where we can more easily share updates and needed fixes for the Galileo board, and a git repository containing the Galileo unique packages, plus any packages that end up needing little bit of tweaking to run properly on the Galileo.
https://sourceforge.net/projects/galileodebian/
I have taken the released kernel source (3.8.7) for this board, and put it in a Debian package so that it is properly integrated into the image. Also present is a galileo-system package that provides some of the board specific configuration needed.
The SD card image is just a regular GPT based disk image that works with EFI. In addition to the Galileo kernel, it also has a Debian 3.2 kernel installed so it can be booted on a real EFI system, or on a convenient VM like Virtualbox or QEMU.
I hope people find this project useful and enjoy being able to easily apt-get install whatever Debian packages they want to use.