UPDATE 2010-08-17: Some of this was just wrong due to issues I had downloading the tgz file - see #17. A correctly downloaded file is not compressed twice. I have corrected the errors
NOTE 2010-09-02 : For step by step instructions for to create an SD card from a windows PC see #24 below. (There is some linux stuff but DON'T PANIC)
I have just downloaded this from borders.com.au. Download size is 123 MB.
As the .tgz suffix implies, it is a gzipped tar file. This is a standard unix thing. There are many Windows utilities that will open it, including 7-zip.
I have generated a list of files
$ tar tzf bordersau-full-1_4.tar > bordersau-full-1_4.txt
Given the file structure and presence of busybox, it is almost certain that the KOBO runs linux and used GPLed code.
If we look at the busybox binary:
$tar --strip-components=2 -xzf bordersau-full-1_4.tar ./bin/busybox
$strings busybox
we see:
Copyright (C) 1998-2006
Erik Andersen, Rob Landley, and others.
Licensed under GPLv2.
Oh dear. Where is the source? Unlicenced use of busybox is actively pursued in the US courts - see
http://www.groklaw.net/article.php?s...00803132055210
UPDATE: The source is now available
here.