Some of the features found in Windows7 Explorer have proven to be handy. I find myself wishing Nautilus had them:
-Preview Pane
-ability to see if a folder is empty or full by looking at it
-ability to sort items by Type in Categories so each type is demarcated from the others
-additional file sorting options in the List heading
-ability to see mp3 Title headings in the List heading
Bookmarks