For those who are interested in an Office document editing solution; just wanted to let you know that DataViz is officially on board to bring Documents To Go to the iPhone. You can sign up to be notified about release info here: Documents To Go for iPhone
If they have copy and paste, I suspect it would be limited to within documents to go. Syncing files would be great, as would emailing and creating documents. Although at this point I would settle for just editing documents.