Southeast Asia Tsunami: Missing Persons
Flickr is almost certainly the best online photo management and sharing application in the world. Show off your favorite photos and videos to the world, securely and privately show content to your friends and family, or blog the photos and videos you take with a cameraphone.
http://www.flickr.com/groups/tsunami_help_missing/

Missing Persons Identification Resource Center (MPID)
The home page for MPID (Missing Persons Identification Resource Center), a tax-exempt organization serving families and friends of missing persons.
http://www.mpid.org/

Katrina Missing Persons
National Center for Missing & Exploited Children (NCMEC) hotline to take reports of missing children, missing adults, and found children. Pictures and information of some of the people.
http://www.missingkids.com/missingkids/servlet/PageServlet?LanguageCountry=en_US&PageId=2077

USA Records Search
Find True DOB Social Security Number Lookup Linked Records - Criminal Background Check, Court Records, Criminal Search, Date Check, People Finder, Nationwide
http://www.usarecordssearch.com

NOLA.com: Searching Forum
Posts by people looking for missing persons.
http://www.nola.com/forums/searching/

Private Investigators UK
Private Investigators and detectives in the UK. Services in England, Germany, Switzerland, Europe and international. Investigating missing persons, handling background checks and surveillance, and corporate enquiries.
http://www.uk-private-investigators.com/

A.G. Oxlade & Associates,Inc.
A.G. Oxlade & Associates, Inc. Private investigators in Toronto, Ontario, Canada experienced in Missing Persons, Background Checks, Estate Matters, Witness Statements, Crime and Accident Scene Photography, Activities Surveillance, Process Serving and Court Filings.
http://www.agoxlade.com/

Tristar Investigation
Legal investigator, california private investigator, service detective agency, los angeles private investigator
http://www.tristarpi.com/

Aceh Media Center
Includes news, missing persons billboard and a list of needs. [Information in English and Indonesian]
http://www.acehmediacenter.or.id/

Southern Investigations
Offers surveillance, tracing of missing persons and video/photographic evidence for matrimonial and insurance fraud.
http://www.southern-investigations.com