Looks like Gimp <=2.0 had it like some of the other major contenders.

#1 PSP has 'Pixel Size' & 'Actual / print size' in a dialog called 'Resize' and it's located under the 'Image' menu.
http://mardiweb.com/web/psp7/menus/image/resize.jpg

#2 PS has 'Pixel Dimension' & 'Document Size' in a dialog called 'Image Size' and it's located under the 'Image' menu.
http://www.louisemarks.com/normankoren/Resize_Switztrail_Photoshop_3072W.gif

#3 Fireworks (Macromedia) has 'Pixel Dimension' & 'Print Size' in a dialog called 'Image Size' and it's located under 'Modify'.
http://www.uclan.ac.uk/ldu/resources/guides/fireworks/resize.gif