Slawek having been on the tender process for numerous Government contracts (both inside in the Government and outside in vendors) the key pros / cons for Linux I see are: 1. Pro - reduced TCO 2. Pro - easy sell for servers 3. Con - hard sell for desktops. I did not see anything particularly solid in preventing this - its more a lack of understanding. Im sure some areas really could not do without Office but most that make this claim are in my experience wrong about OpenOffice capabilities. Some sites have custom .net apps running so it would be critical that Mono or some equiviliant really worked. Actually I dont really understand all the whining about Mono as I understand that is is now an open standard and not a MS standard? Theres probably going to be the occasional legacy app written on the win32 application platform that doesnt play nice with Linux. What we did on one project where all the infrastructure was replaced was to have a few citrix sessions running legacy apps - for some reason they didnt want virtualisation for desktop apps. In my experience even getting OpenOffice into departments was difficult. The one place that was done was on a Java developer build where the users were all developers working on Java projects.