VMware, an EMC subsidiary whose software lets multiple operating systems run on the same computer, is expected to announce next week that it will begin giving away one of its key products for free, CNET News.com has learned.

This article goes into the motivation and architecture for DTrace -- and describes some of the problems that remain to be solved in system observability. The article also includes a short case-study on using DTrace to find a real problem -- a problem that was ultimately due to some seriously fugly code in a monitoring app.

Microsoft's long-awaited Windows Server 2003 R2, the update to Windows Server 2003 with Service Pack 1, is finally generally available, the company said on Feb. 1. This widespread availability follows the December 2005 release to manufacturing of the final code for this server software. Microsoft customers will now be able to buy Windows Server 2003 R2 pre-installed on hardware through companies such as Dell, Hewlett-Packard and IBM, and Microsoft's enterprise Software Assurance customers will get their Windows Server 2003 R2 updates in the near future.

For years computer interfaces have been held back by two dimensions. The power and flexibility of three dimensional interfaces have remained the stuff of science fiction movies, video games and very custom high-end applications. Aoren Software now brings that power to everyday applications and operating systems through a window server and framework technology called Vision. Vision was designed from the ground up to break away from old paradigms and provide the interface needs of the next generation. Application developers can get their hands on the technology with the developer preview release and start creating programs that have previously resided only in the imagination.

GNOME 2.13.90 has been released. As always, the odd-numbered branches indicate dev-branches, and as such the 2.13.x series is the step-up to the GNOME 2.14 release, planned for March this year. The 2.13.90 release is the first beta. Release notes: platform, desktop, and bindings; downloads: platform, desktop, and bindings.

"The first security and stability update to Mozilla Firefox 1.5 has been released. It is recommended that all Firefox users upgrade to this latest version. Downloads are available from GetFirefox.com. The update is also available for other systems and languages. More details can be found in the Mozilla Firefox 1.5.0.1 release notes."

Fedora Core, a popular flavor of Linux being developed by the open-source community, is hardly hefty by today's operating system standards. But to fit the tight specs for the $100 laptop being designed by MIT's One-Lap-Per-Child group, Fedora will need to go on a crash diet, concedes its overseer, Red Hat. The Linux software maker confirmed today that it has donated $2 million to the OLPC and joined as a corporate member and said it plans to put some of its brightest engineers to the task of slimming down Fedora before the laptops debut in early 2007.

After two years of work, since the 3.50 release, Fyodor announced the Nmap Security Scanner version 4.00. Changes since version 3.50 include a rewritten (for speed and memory efficiency) port scanning engine, ARP scanning, a brand new man page and install guide, runtime interaction, massive version detection improvements, MAC address spoofing, increased Windows performance, 500 new OS detection fingerprints, and completion time estimates. Dozens of other important changes - and future plans for Nmap - are listed in the release announcement. Fyodor also gave an interview on 4.00.

A demonstration of the next release of Novell's Linux for desktops drew cheers and applause Wednesday, although the final version of the software is not expected for some months. Nat Friedman, the company's vice president of Linux desktop engineering, showed Novell Linux Desktop 10 playing videos and MP3 music files, and exchanging music and photos with an iPod and a digital camera, in a keynote presentation at the Solutions Linux conference and trade show on the outskirts of Paris.

"AMD has been a leader in getting 64-bit technology off the PowerPoint and into servers, desktops, and wherever else they can put it and has a clear-cut technology advantage over most of the current crop of Intel processors. For a company that likes to 'Think Different', Apple chose a conservative path in selecting Intel processors to power its latest generation of computers." In related news, our favourite Windows Apple fanatic Paul Thurrot wonders why there's no PC equivelant of Apple's iLife.

Microsoft has released the 2nd beta of Internet Explorer 7 to the general public. You can read the release notes, or watch a tour of the new features. Microsoft warns you not to use this beta a production environment: "Evaluation of Internet Explorer 7 should start now, but the software should not be used on production systems in mission-critical environments. Internet Explorer 7 Beta 2 Preview will only run on Windows XP Service Pack 2 systems, but will ultimately be available for Windows Vista, Windows XP Professional x64 Edition, and Windows Server 2003." Update: You might have been expecting this, but there's already a DoS attack out there for this new beta.

The AROS team has posted their first update of 2006. "Georg Steger has fixed input preferences for mouse, in order to improve mice tracking and pointer precision on the screen. Mathias Rustler has updated documentation for users and developers, adding some nice hints and removing obsolete informations. You'll find signs of his work through this site. Mathias has also commited ExecuteStartup, a little tool that executes whatever application you'll copy in the SYS:WBstartup drawer. Thanks to Nick Andrews and Jack Patton AROS has got IRC and Telnet clients. In order to enable networking on hosted version of AROS, Michal Schulz has commited a .tap interface hidd for all Unix targets."

"Silicon Graphics announced today that Dennis McKenna has been named chairman of the board, chief executive officer and president, effective immediately. McKenna succeeds Robert Bishop, who will remain on the board of directors and serve as vice chairman. "Dennis McKenna is a proven leader, with an established track record of driving positive results in difficult business environments. He is well balanced in strategy, business development and operational execution - a combination that we believe will bring improved results to SGI and its stakeholders," said James McDivitt, SGI's lead director." Update: El Reg has more on this.

"We are challenging you, the Java developer community, to find functional regressions between J2SE 5.0 (Tiger) and Java SE 6 (Mustang). The contest runs from Jan 31 through March 31, 2006, with prizes to be awarded in mid-April. You will find details on the contest home page and FAQ. The complete entry requirements are in the official legal rules governing the contest. You can enter the contest using the contest entry form. Prizes? There are five Ultra 20 workstations which will be awarded to the best regressions found during the contest. In addition all successful entrants, whose regression is entered into Suns internal database, will be given a t-shirt as our thanks to you for participating."