one of the drawbacks of using web based applications is the top area space wastage, with address bar , bookmarks toolbar and tabs occupying so much space at the top and that any additional space taken by application in top area just worsens the whole user experience of using web based application further more.
Google docs team can you please remove or have some option to hide the top area in the google docs. see attached image.
Update 12/1/2010: Google has release a option to hide that wasted space. Go to View -> Compact Controls
see image below to see where the menu command to hide the top space is located.