Martyn WilliamsIDG News Service Follow me on Google+

Martyn Williams covers mobile telecoms, Silicon Valley and general technology breaking news for The IDG News Service.

Japan user marks Twitter's 20 billionth 'tweet'

Twitter passed another milestone on Saturday with the sending of tweet number 20 billion.

Amazon's new Kindle rachets up e-reader price battle

Amazon.com's announcement that it will launch a new version of its Kindle e-book reader in late August could further stoke a price battle between major players.

Panasonic shows prototype 3D lens for Lumix cameras

Panasonic showed for the first time on Wednesday a prototype lens for its Lumix DSLR cameras that will give them the ability to capture 3D still images.

Foursquare registers 100 millionth check-in

Foursquare, the location-based social-networking service, registered its 100 millionth "check-in" on Monday evening, it said Tuesday.

Sharp plans to launch e-book reader this year

Japan's Sharp plans to enter the increasingly competitive e-book reader market later this year with a device that can read a file format of its own

Apple says 400 iTunes accounts hit with fraudulent purchases

Apple has banned a developer from its App Store after fraudulent purchases of his applications were made from around 400 accounts, it said in a statement.

Amazon raises the specs, cuts the price on latest Kindle DX

Amazon will launch on July 7 a new version of its Kindle DX that features a better screen and costs $110 less than the current model.

Sony says 535,000 laptops at risk of overheating

More than half a million Sony laptops sold this year contain a software bug that could lead them to overheat, the company said Wednesday.

Sony launches 3D TVs, games

Sony's plans for 3D entertainment begin coming together on Thursday as the company kicks off sales of 3D TVs and begins offering 3D games for its PlayStation 3.

Pixel Qi shows prototype touchscreen displays

Pixel Qi, a display start-up that's generating buzz for its laptop screen that works well both indoors and outdoors, showed off prototype touchpanel versions.

Protesters provide noisy welcome to Computex

About 30 demonstrators provided a noisy start to the Computex trade show in Taipei on Tuesday when they protested working conditions in the tech industry.

Apple to SIM-lock Japanese iPads

Apple appears to have reversed course in Japan on a key feature of its iPad 3G and won't offer a version capable of being used with any cellular carrier.

Fujitsu improves color e-paper screen

Fujitsu Laboratories will unveil next week a new version of its electronic paper display that's easier on the eyes, the company said Friday.

Sony to end floppy disk production

Sony will end production of floppy disks next year due to dwindling demand, it said Monday.

Sony, Panasonic cameras combine small size with SLR features

Panasonic and Sony have shown new cameras that mix compact size with interchangeable lenses.