Talkleft has the scary lowdown on "sneak and peek" searches.
For those not familiar with "sneak and peak" searches, Section 213 of the newly enacted Patriot Act allows the police to enter and search a home without telling anyone they have done so, seriously undermining the Fourth Amendment and one’s ability to mount a fourth amendment challenge to the search or any other kind of defense.
Section 213 is not limited to terrorism investigations. It applies to the search and seizure of any property or material pursuant to a search warrant “that constitutes evidence of a criminal offense in violation of the laws of the United States.”