This a sample of PowerPoint Presentation via GDocs

But you can always visit the direct link as well.

http://docs.google.com/present/view?id=dgh9ngtk_3dw7hjvdb

Another cool power point presentation - Google reader

http://docs.google.com/present/embed?id=dgh9ngtk_8gjxxjxc9

Another cool power point presentation - Del.icio.us

http://docs.google.com/present/view?id=dgh9ngtk_20g9n7r8g5