Law and Economics Associations:

• The European Association
• The Australian Association
• The United States of America Association

Other Associations:

• New Zealand Association of Economists
• Econometric Society

Journals: 

• Journal of Law and Economics
• The Journal of Law, Economics and Organisation

Books

• The Origins of Law and Economics (Edited by Francesco Parisi and Charles K. Rowley)
• Law, Economics and Antitrust (Patrick McNutt)
• The Elgar Companion to Law and Economics (Jurgen G Backhaus)
• The law and economics of antitrust and intellectual property (Dina Kallay)

Encyclopedias

• Encyclopedia of Law and Economics

Law and Economics Programs:  

• Centre for Law and Economics, ANU
• GMU
• L&E at Chicago
• University of Waikato
• University of Auckland
• Victoria University

• Seina - Doctoral School in Law and Economics (with a useful seminars section)

Other Law and Economic Sites of Interest:

• Useful links at American Law and Economics Association
• Law and Economics Resources @ FindLaw
• Law and Economics working papers @ EconWPA
• Motu: Economic and Public Policy, New Zealand
• Law and Economics Mailing List at George Mason University
• Resource Management Law Association of New Zealand