Has anyone opened an excel spreadsheet on their N900? 4 of the first 5 shortcuts on my E90 are to spreadsheets (Scratchpad, RestaurantSplit, TrainSched, GasMileage) as I use spreadsheets like most people use widgets. Does the DataVis program included allow using (and saving) .xls files? Can it be upgraded to do so? What about KOffice and/or Open Office? Thanks