I am a Google Docs power user. In fact, according to Grammarly, I've written over 6 million words in Google Docs over the past 18 months, so it's pretty safe to assume I live and die by the service.

OpenOffice.org has multiple Undo levels. You can set the levels as high as you like from Tools -> Options -> OpenOffice.org -> Memory -> Undo. However, if your files receive extensive revision or if ...