@ As someone who was previously tasked with getting Debian to fit in a 512MB flash drive for work (web kiosks) I can tell you that it is very, very easy to start diverging from your upstream distro when space becomes a problem. Fitting Maemo in 128MB of flash is quite an incredible feat, and obviously sacrifices were required along the way. I can tell you right now that my minimally functional Debian requires 550MB+ of flash. This can be reduced but it will never fit in the onboard NAND. Also, Debian is definitely using more memory than ITOS. This can be reduced but probably not solved entirely without making it something else besides