I ran across an interesting source of information about salaries for
law library positions in academic law libraries:
http://www.collegiatetimes.com/databases/salaries. It allows you to
see salaries for what appear to be all employees (at least on the
academic/administration side) of public universities, compiled using
FOIA requests. To run a search for law library salaries, you select
the school from the list on the linked page, include the keywords <law
library> in the Department field (you can include just <law> to see
all law school salaries), select the desired year(s), and then hit
Search. The results I've seen seem to be consistent with the salary
surveys available on
aall.org, but it is interesting to see the
numbers for a particular school.