United States v. Marks, ___ F.3d ___ (9th Cir. Aug. 23, 2004) (conviction counts as predicate conviction in federal prosecution for violation of 18 U.S.C. 922(g)(1), although conviction found was unconstitutional based on ineffective assistance of counsel).
http://caselaw.lp.findlaw.com/data2/circs/9th/0330464p.pdf