DesktopLinux.com, which is a Web site devoted to, obviously, desktop Linux, has finished a survey that found more than a doubling of Linux desktop users in the past year. Ubuntu remains the top choice for Linux on the desktop, with 30 percent of respondents using it. While DesktopLinux.com said its survey is not scientific, the survey did produce 38,000 votes as opposed to 14,535 votes a year ago. Survey respondents chose Firefox as their browser of choice, with 60 percent using it. Thunderbird was the top email client, with 37 percent. Software Development