Gadgets, Linux | featured news

Raspberry Pi, the tiny, ultra-cheap, Linux-based PC, went on sale Monday in the U.S. through retailer Allied Electronics, but it's already out of stock. The A version of the computer, which only costs $25, has 256MB of RAM, a single USB 2.0 socket, an HDMI, SD card, and 3.5 audio sockets, but no Ethernet port. Available only through Allied, the A is now completely out of stock for U.S. customers. The $35 Raspberry Pi B is also out of stock at Allied, but it can be bought through Newark, another retailer, which only carries that particular model.

The Linux-based Ubuntu operating system is to work on smartphones, allowing users to run full-scale programs on handsets designed for Android.

Canonical founder Mark Shuttleworth thinks Ubuntu Linux has a shot to be a contending operating system for future phones and tablets. It'll be a tough go -- Apple iOS and Google Android dominate the field now, with new Windows Phone 7 also making a play.

The ultimate hacker phone, the Nokia N900 is the truest expression of Linux—the OS and the philosophy—that you'll find on mobile this year. It's a great niche gadget. But the idea that free, open-source solutions will sweep the mobile world is just as doomed in the U.S. as the idea of popular, open-source desktop PCs—in this case, because mobile networks don't welcome the unexpected, and they don't welcome geeks.