content: That's the biggie and it really is a biggie. I work in IT hosting and even moderately large companies pay millions in licensing to Microsoft. FOSS office products are a great idea for most companies and even governments. They're usually not much harder to deploy and manage going forward than MS Office. The real difference in support is end-users on Linux. Even that, though, is always improving as there are many user-friendly versions of Linux around. The savings in licensing almost always more than pay for the slightly more expensive sysadmins necessary to maintain a FOSS end-user environment.