The Danish Ministry of Transport has succesfully migrated to
LibreOffice. The project is called 180 degrees and consist of several
parts. One is migrating away from MS Office to LibreOffice. The
translated story (please note that the amount is DKK and not USD):
http://translate.google.com/translate?sl=da&tl=en&js=n&prev=_t&hl=da&ie=UTF-8&layout=2&eotf=1&u=http%3A%2F%2Fwww.version2.dk%2Fartikel%2Fministerium-faar-milliongevinst-med-skift-til-virtuelle-desktoppe-og-libreoffice-44101
The business case (please note that the amount is DKK and not USD):
http://translate.google.com/translate?sl=da&tl=en&js=n&prev=_t&hl=da&ie=UTF-8&layout=2&eotf=1&u=http%3A%2F%2Fwww.magenta-aps.dk%2Fopenoffice%2Ftrm_case%2F