Thanks for that, I find this really interesting.
I guess this archive will also work for n800?

Can you explain a bit the first steps of how you initialy started the process? Made a loopback, downloaded a few base files (via debootstrap?) and then via chroot you started the loopback and then went on installing?
I'm quite interested to understand how you transfered this repo into a workable rootfs. I would like to try to redo this stuff on my side for education purpose.

At the moment I've only downloaded the targz. I have no device to test it. But why is it so big? 789Mb uncompressed? Wouldn't it be better to let the user apt-get the non-critical stuffs (I mean the WM and skins, fine but that doesn't make 789Mb or?)