As we return to work this first week of 2006, Linux users with the post-holiday blahs, cabin fever or seasonal affective disorder should be glad to know there is a lot to look forward to this year.Here is a rundown of expected Linux happenings in 2006.FebruaryUsers of Red Hat\u2019s free Fedora Core operating system will get an upgrade when Version 5 of the software is released. The new code will include Xen virtualization software - a precursor of more to come from Red Hat in \u201906 - as well as an SELinux security package and a LDAP directory administration tool.MarchExpect to see Novell\u2019s SuSE Linux Enterprise Server 10 (SLES) released around the time of its BrainShare conference in Salt Lake City. Improved system management features, and server virtualization management.AprilLinuxWorld Expo organizers decided last year\u2019s February show in Boston might have been a little to chilly. The 2006 show, running April 3-6, will take place at a larger venue as well - the new Boston Convention & Exhibition Center.May\/JuneExpect PalmSource to make its first Linux offering around the end of the first half of the year. Palm OS for Linux will give Palm devices a broader set of hardware and application options as Linux becomes a more popular platform for handheld computing.June\/JulyThe Open Source Development Lab is expected to have the first release of its Project Portland out by the beginning of the summer. The desktop-focused Linux effort sets common application criteria for personal Linux PC software and includes input from Adobe Systems, AMD, Eclipse, FSG, Gnome, IBM, Intel, KDE, Mozilla, Nokia, OpenOffice, Red Hat and others.AugustLinuxWorld Expo takes place for the seventh year at the Moscone Center in San Francisco. At LinuxWorld, expect to hear from Novell again, as it launches an update to its Open Enterprise Server, which includes both its NetWare and SuSE Linux operating system kernels.September\/OctoberRed Hat Enterprise Linux 5 is expected to launch at the beginning of the fall. The new software will wrap in the Xen virtualization software for servers, as well as a new \u201cStateless Linux\u201d feature, allowing thin clients to run a full desktop client environment hosted on a RHEL 5 server.November\/DecemberIBM is expected to move more aggressively towards Open Data Formats (ODF), also known as the OpenDocument format. Documents created in IBM applications - such as its Lotus suite - will use a standard, open source file format, allowing the documents to be viewed by users who do not have the originating software.