download calibri.tff fonts

see http://www.oooninja.com/2008/01/calibri-linux-vista-fonts-download.html

1. download powerpoint viewer http://www.microsoft.com/downloads/details.aspx?familyid=048DC840-14E1-467D-8DCA-19D2A8FD7485
2. run script

$ cabextract -F ppviewer.cab ~/Downloads/PowerPointViewer.exe
$ cabextract -F '*.TTF' ppviewer.cab
$ mv *.TTF ~/.fonts/