"Personal Digital Assistants"—have exploded in power, performance and features.

The whereabouts of more than 100,000 cell phone users have been tracked in an attempt to build a comprehensive picture of human movements. The study concludes that humans are creatures of habit, mostly visiting the same few spots time and time again. Most people also move less than 10km on a regular basis, according to the study published in the journal Nature. The results could be used to help prevent outbreaks of disease or forecast traffic, the scientists said.

A study detailed in Nature exposes the local nature of humans: we like to hang around our homes. But that's not what caught my eye. It's the way the study was conducted.

There have been conflicting reports over the past couple days on whether or not the 3G iPhone is physically present in North America and Canada specifically or if it is delayed globally.

We all want the latest gadget. And when we buy one, and it's rendered obsolete, or just surpassed in some way, some of us get really testy. The $200 price cut Apple gave iPhone buyers last year even led to a lawsuit by one of the original buyers. It seems that French carrier Orange might be trying to proactively prevent unhappy customers by offering an upgrade path to the 3G iPhone.

On Tuesday, the Supreme Court declined to hear arguments on a class-action lawsuit challenging the policies of T-Mobile and AT&T against unlocking cell phones. By declining to review an October decision by the California Supreme Court, they have cleared the way for a lawsuit that attorneys claim could represent "millions" of Californians.