The author of a worm which caused widespread disruption to PCs and networks has attempted to repair the damage by creating software to remove it. However, security experts say the removal software is considerably less effective than the original worm.

While the One Laptop per Child (OLPC) project has taken on the aura of a charity – if you believe what you read in the mainstream media – the hard numbers tell a different story. Analysts say the component suppliers that have taken a gamble on the project stand a fair chance of coming out winners.

Successful trials of a Viagra substitute have lifted the share price of its developer, Dong-a PharmTech of Korea. The drug, Zydena, or Udenafil, is already one of Korea's best selling pills, despite facing a stiff challenge from Viagra.

What the company describes as 'intercourse completion rates', were doubled to almost 70 percent for couples using the highest doses of the drug in the trial. The rate for those using a placebo was 38 per cent.

UPDATED MARCH 27: Nintendo has changed the design of its Wii games console to combat modchips, modchip developers in China have charged. Several design changes can be seen on new Wii motherboards, in photographs that appear to support these claims.

Some sources allege that the changes make it more likely the Wii could be damaged by modchip installation, we have not been able to verify this, however.

Surgeons could perform operations without cutting the skin by using a new magnetic manipulation technique, the scientists who invented it say. They hit upon the idea after seeing teenagers use strong magnets to attach jewelery to their lips without piercing them.

In animal tests, the researchers were able to remove a kidney using the technology. Magnets outside the body were used to position a camera and surgical tools within. More details at EurekaAlert.

An internet connection owned by SCO, the firm at the center of a legal battle over the open source operating system Linux, was used to delete information from SCO's Wikipedia entry last month.

Contributors to online discussion groups have now suggested that the same individual later went on to remove substantial amounts of unfavorable information from the Wikipedia entry, but the evidence they have so far offered to support this view is not strong, and appears to be circumstantial, at best.

Trojan horse software is being used to artificially boost websites' positions on Alexa.com, the leading internet traffic measurement chart, security researchers suspect. The covertly-installed software first installs Alexa's traffic monitoring toolbar on the victim's PC, and then forces the victim's web browser to visit several websites, thereby increasing their ranking in Alexa's statistics, according to FaceTime Security Labs.

The world's first intercity magnetic levitation train line, capable of running at up to 500 kmh (310 mph), will be built in China, authorities have confirmed today. The first section of the line is scheduled to open in 2010, China Central TV news reported.

While revolutionary new inkjet printing technology from Silverbrook Research has set the printer industry abuzz, few outsiders have been permitted to closely examine the print quality of the prototypes.

Can $200 inkjet printers working at more than twice the speed of anything else on the market actually print clearly, without smudging the ink? And even if this breakthrough technology really works, how can a tiny company like Silverbrook survive in an industry dominated by giants like HP, Canon and Epson?

A cybersquatter who took control of the WalMart-USA website has said he will put pornographic movies on the site if Wal-Mart does not buy it from him, Wal-Mart's lawyers have claimed. US-based Wal-Mart is the world's largest retailer, with more than 6400 stores worldwide.