I now own the "The Making of Star Wars" iBook. I've been working on deDRM'ing the 720p for you, Harmy.

The iBook itself isn't encrypted. In fact, the ".ibooks" format is just a ZIP file, so renaming it as ".zip" allows me to get at the contents with 7-Zip.

The deDRM program, Requiem 4.1 (the final version), will only work with iTunes 10.7, so I have it and iTunes 10.7 installed in a Windows XP virtual machine running on VirtualBox.

Requiem claims that it can't find any DRM'd files in my iTunes library (yes, I made sure to download the book with iTunes in the VM first), so I extracted all the files and invoked it from the command-line as "requiem.exe input-file output-file" where input-file is one of the m4v files from the iBook.

Requiem determines that the m4v is DRM'd, but gets stuck in the "working" state and never produces an output file.

This is just a progress update.