Booklist/Booklinks - (although we are routing this to several people already. Suggest sharing subscriptions)

Horn Book - I really like these articles and reviews. Makes you want to read them all. Good info about authors

Knowledge Quest - the "Journal of the American Association of School Librarians". Good research based information and Association news.

School Library Connection - Lots of practical information and good instructional ideas.

School Library Journal - Standard review source and interesting articles

Voya - Voice of Youth Advocates - Good secondary reviews.