U.S. Citizenship and Immigration Services (USCIS) issued a reminder that effective May 7, 2013, employers must use the latest version of the I-9 employment eligibility verification form for new hires. The new form has a revision date of "03/08/13 N" in the lower left corner of the first instructions page. It expires on March 31, 2016.
Q&A's on the E-Verify monitoring and compliance functions are available here.
A USCIS I-9 blog explaining details about the new form is available here.