After selecting the Form option, Google opens a wizard that lets you add questions, email or embed the form.
The form saves all the changes automatically and you can now reorder the questions using drag-and-drop.
What I don't like is that Google doesn't link to the spreadsheet which includes the form, so you have to find the spreadsheet by going back to the documents list. The relation between forms and spreadsheet is confusing and it would be nice to detach the forms from spreadsheets and use the forms as one of the many possible data sources, along with feeds, CSV files published on the web, financial data etc.
