Others list details of where loved ones were last seen. Some have pictures of the missing.

All convey the aching desperation of people from Italy to the United States seeking news about family or friends caught in the earthquake and tsunami that ravaged southern Asia.

Web sites and Web logs have become the announcement boards and lost-and-founds for a disaster that has left many thousands of people unaccounted for, including 2,000 to 3,000 Americans and thousands more Europeans and other non-Asian visitors to the region.

Some used the Internet to link names with photos, sometimes with a happy ending.

On Wednesday, a Swedish toddler, Hannes Bergstroem, was reunited with his injured father at a Thai hospital, days after being found wandering alone in the wreckage. The 2- year-old's uncle had spotted the child's photo posted on the Web by another hospital and claimed him Tuesday, setting up the reunion with Hannes' father, Marko Karkkainen.

But Hannes' mother, Suzanne Bergstroem, was still among some 5,000 people missing in Thailand.

It's an example of the reach and immediacy of modern technology. With cell phones, thousands of people in the disaster zone were able to send text messages to newspapers and television stations, getting word back home.

On the British Broadcasting Corp.'s Web site, dozens of people posted notes seeking someone.

``Does anyone have news of my colleague Chuck Kearcik and his wife Melinda and children Candice and Charlie (US citizens working in Kuwait, vacationing in the Maldives)?'' inquired Andy of Kuwait City.

Cheryl Boehm of Houston searched for her father, Jesse L. Adams. ``He is an American citizen and is retired living on South Pattaya Beach. Please contact me with any information as I have no way to find or communicate with him right now! Please help me find my Dad!!''

Others sent text messages from across continents in a bid to find those who are missing.

In Sweden and Denmark, mobile phone operators stopped charging for mobile calls to and from Southeast Asia for 48 hours to make it easier for survivors to get in touch with their families and friends back home.

``We thought it would be a nice move from cellular phone companies,'' said Robert Neimanas of the Swedish group Telia's branch in Denmark.

The Swedish companies also sent text messages to all Swedish-registered phones in Thailand asking subscribers to call their families or the Swedish Embassy.

The State Department urged American travelers to get in touch with loved ones back home.

``Call your mother,'' State Department spokesman Richard Boucher said Wednesday.

In the Nordic nations, blogs and Internet bulletin boards were rife with queries about people among the 2,700 missing Finns, Norwegians, Swedes and Danes.

``Veronika Priebe Jakobsson and her family? They were in Thailand? Has anyone heard from them?'' asked one post on the Phuket Disaster Message Board.

Another message, from Glen Barlow, said: ``We are looking for Nigel, Lotta and little Alec from Sweden.'' It adds details about Briton Nigel Atterbury, his Swedish partner Liselott Hallberg and their 3-year-old son, Alec.

One of the lucky few, Barlow posted another message less than six hours later saying the family had been found and was flying home.

Valerio Natale, a 14-year- old Italian, started a Web site a year ago about ``The Simpsons'' television show, but this week he replaced it with a site for Italians searching for missing relatives.

``I just wanted to help,'' said the teenager, who lives in the village of Amelia in Italy's central Umbria region. ``Everyone has to make a contribution when something like this happens.''

He said 20 people in Italy had contacted him by Wednesday asking for information about missing relatives.

For people with a less personal interest, the Internet also provided images and news of the destruction, including firsthand accounts from bloggers who lived through the waves and quickly posted pictures and descriptions.

The International Red Cross started its own Web site Wednesday to help people track down survivors.

It has sections for Sri Lanka, Thailand, Indonesia and India, which were the hardest hit by the quake and ocean surges. Most registrations on the first day were by people seeking missing from the Nordic countries, Britain, Germany, France and the United States, particularly California.