I love this list, and would love to see an updated list so I can add the recommendations to my reading list :)

Have you ever checked out OSTEP: Three Easy Pieces? (http://pages.cs.wisc.edu/~remzi/OSTEP/) I am finding that a much more accessible, organized, and easy-to-ready resource than Tanenbaum's Modern Operating Systems. What do you think of it?

Also, I've recently got my hands on "Practical Filesystem Design," written by the developer of the BeOS filesystem. A PDF is available here: http://www.nobius.org/dbg/practical-file-system-design.pdf