From the ALA:

Mean librarian salaries up 2% in 2008
Analysis of data from more than 1,010 public and academic libraries showed that the mean salary for librarians with ALA-accredited master’s degrees increased 2% from 2007, up $1,151 to $57,809. The median ALA MLS salary was $53,251, and salaries ranged from $22,000 to $331,200. Results are reported in the 2008 edition of the ALA-APA Salary Survey: Librarian—Public and Academic, published by the ALA–Allied Professional Association….