Hi there,
have you seen the ideas from her Majesty’s Treasury http://www.hm-treasury.gov.uk/spend_challenge_ideas_2.htm:
8. In terms of spending less - what about migrating the whole of government (the NHS, Education etc) from Microsoft products to Linux and open source software like Openoffice.
and http://www.hm-treasury.gov.uk/spend_challenge_ideas_5.htm:
28. Annul the government’s agreement with Microsoft to provide software and operating systems (OS) to government departments and switch to open source software and Linux based operating systems. This would reduce costs by: Reducing the need to update hardware in line with new Microsoft OS releases. Linux OS and open source software has a lower whole life cost and is less susceptible to viruses. Support a more diverse spectrum of the IT industry, instead of one corporation; generating additional UK tax revenue.
(Also added that to http://blogs.fsfe.org/mk/?p=614.)
Regards, Matthias