U.S. First Lady Michelle Obama quickly snapped up tens of thousands of Twitter followers Thursday, as she joined the social network and opened a new front in her husband's reelection campaign.

"Hi, everyone, and thanks for the warm welcome. Look forward to staying in touch with you here," @michelleobama said in a tweet authenticated by her initials "mo."

Cyber-environmentalists said Thursday they aim to mobilize millions of people around the world for a mass waste clean-up, saying they had to step in because governments had failed to do so.

Tiina Urm, spokeswoman of the Estonian-piloted "Let's Do It!" campaign, told Agence France Presse that anti-waste activists hoped to see numbers spiral this year thanks to projects in 82 countries, five times more than in the successful 2011 edition.

A New York-based company has developed an iPhone lens attachment that turns video shot by the smartphone into panoramic footage.

The Internet was strapped to wrists at the Consumer Electronics Show on Wednesday in the form of Android-powered "smart watches" that serve up online content along with telling time.

Japanese consumer electronics titan Sony and venture-backed Italian startup i'm Watch were each sporting spins on timepieces that use the Google software to connect wearers with email, music, websites or other online content.

The Saudi hacker who posted details of thousands of Israeli credit cards online, said overnight he had exposed 200 more and threatened to continue exposing the same number every day.

In a message on Pastebin.com, the hacker who calls himself 0xOmar, posted two links including what he said were "200 fresh working Israeli cards" a day after an Israeli hacker exposed than 200 details of what he claimed were Saudi-owned credit cards.

A Dutch court Wednesday ordered two local Internet providers to block their clients from accessing Swedish file-sharing site The Pirate Bay, citing copyright concerns.

"Internet providers Ziggo and XS4ALL must block their customers from accessing The Pirate Bay website," The Hague district court said in a press release.

An Israeli hacker has posted information online about hundreds of Saudis, Egyptians, Syrians and others — a new salvo in the cyber war launched by an alleged Saudi hacker who leaked details about thousands of Israelis last week, an Israeli newspaper reported Wednesday.

The information was posted on the pastebin site late Tuesday by a hacker who identified himself as a soldier in an Israeli intelligence unit, the Yediot Ahronot daily said. He said he was not afraid of a "hacking war" between Israeli and Arab hackers.

The calculator used by the Virginia Tech student killer is up for sale on the Internet along with a lock of hair snipped from notorious assassin Charles Manson and letters from several serial killers.

The market for buying grisly souvenirs linked to infamous crimes is growing in the United States, with a half-dozen websites sharing what is dubbed the "murderabilia" industry.

Google wove content from its social network and Picasa photo-sharing service into its search formula to serve up personalized results to online queries.

"Search plus your world" was billed as a major change to the leading Internet search engine.

The International Consumer Electronics Show kicked off on Tuesday with a dazzling array of high-tech gadgetry including ultra-thin laptops, snazzy smartphones, iPad rivals and flat-screen and 3D TVs.

A record 3,100 companies from around the world have staked out booths in the cavernous Las Vegas Convention Center for the four-day event, displaying their wares over a space equivalent to more than 35 football fields.