USCIS issued a new policy memo, dated Dec 22, 2010, regarding processing EB1-EA and EB1-OR cases, see
http://www.uscis.gov/USCIS/Laws/Memoranda/i-140-evidence-pm-6002-005-1.pdf
http://www.uscis.gov/USCIS/Laws/Memoranda/i-140-evidence-pm-6002-005-1.pdf