United States v. Lopez-Armenta, __ F.3d __ (9th Cir. March 10, 2005) (defendant's challenge to the district court's denial of his motion to suppress is dismissed since he waived his right to appeal pretrial constitutional defects when he entered an unconditional guilty plea).
http://caselaw.lp.findlaw.com/data2/circs/9th/0410081p.pdf