I think that personal library indices could be a huge boon to the project, offering editors a chance to find someone who has a reference book they're looking for and asking the owner to look something up for them. It could be as simple as verifying a citation or something more involved.

Sections are based in part on the classes of the Dewey Decimal System. Note that in my library, computer science falls under technology.

While this page is under construction, here are some useful links:

With all that in mind, here is the (as-of-now-incomplete) listing of the significant contents of my personal library.

Books

Philosophy and psychology

Religion

Social sciences

Language

Science

Geology

Math

Physics

Technology

Computer Science

Engineering

Arts and recreation

Literature

History and geography

Periodicals