I thought it would be interesting to see how much space each unit occupies in the executable files that Delphi generates. This info is available in the map-files that the Delphi linker output so I wrote a tool that parses this file and present it in a window.
Additionally it will also display the approximate size of each symbol in a unit. So you can see what methods generates the largest code.
The tool is open source and available here: http://code.google.com/p/delphiunitsizes/