There is already some information out there that I have found and used, here are the most useful ones I have found so far.
Western Digital's own forum This is an unmoderated site and has quite a lot of information scatterd across a few threads but it is not very easy to read and follow.
Martin Hinner's site A personal site with some useful tools to gain access to your drive using SSH. This is accomplished by "upgrading the firmware" with a simple shell script.
Mario Pascucci's blog Another personal site detailing how to start with a clean hard disk and install debian.
Linux from Scratch A useful site to get the basics of Linux installation process for those new to Linux
NAS-Central A place where all hacking communites come together
Compile/install ncurses, lynx, vim and samba Some tricks to compile working binaries from current samba sources.
mybookworldedition.free.fr A French site about WDMBWE
www.Highlevelbits.fr FeaturePacks for Blue ring wand White light Mybooks : Automatically configure features for your Mybook.
. Some links are currently broken. Perhaps they will come back some day.
Mark's Blog: Welped.com Some blog entries on hacking MyBook (including setting it up as PHP web server)
Charles Hayden's site, Notes on setting up MyBook pulling together information from various other places.
. Both web sites are available on the web archive…
For example: http://web.archive.org/*/http://chayden.dyndns.info/info/mybookworld:top