Office Web Apps for you to try:
Check it out: http://blogs.msdn.com/officewebapps/archive/2009/10/20/9910059.aspx [6]
Excel:
PowerPoint:
Word – not available
OneNote – not available
Links:
[1] http://pulse.veltsos.com/category/it/software/software/os/microsoft
[2] http://pulse.veltsos.com/category/it/office
[3] http://pulse.veltsos.com/category/it/software
[4] http://pulse.veltsos.com/category/it/web
[5] http://linux.philosweb.com/drupal/files/image_0.png
[6] http://blogs.msdn.com/officewebapps/archive/2009/10/20/9910059.aspx
[7] http://linux.philosweb.com/drupal/files/image_1.png
[8] http://linux.philosweb.com/drupal/files/image_3.png
[9] http://linux.philosweb.com/drupal/files/image_7.png
[10] http://linux.philosweb.com/drupal/files/image_9.png