Amund, what would you like to edit? You can change the name, tag profiles, change the date ... Click on the picture and then on the several 'edit' links
Editing the picture itself (sharpen, ...) isn't possible.
1/27/2012 at 2:37 PM
In tree view you can however make the most common needed edit: Cropping. Check the Resize Photo option in the More menu (when using default tree view) This resize does not affect other profiles tagged to the same photo.