United States v. Tarallo, ___ F.3d ___ (9th Cir. Aug. 20, 2004) (defendant may commit securities fraud "willfully" in violation of 15 U.S.C. 78ff and 17 C.F.R. 240.10b-5 even if he did not know at the time of the acts that the conduct violated the law if s/he intentionally acted with reckless disregard for the truth of material misleading statements).
http://caselaw.lp.findlaw.com/data2/circs/9th/0250252p.pdf