Midnight Sepia applies a soft-focus effect, as well as a slight sepia toning (or any other hue, you can choose) to create a 'dreamy' effect
This is a script-fu version of the gimp-python script that has been available for a while, I dont know how the final result compares but i hope it is close
For others who maybe have no idea how to place the script - try [link] It isn't my site, it's just a place I've checked out from time to time.
Unbound Variable!
*gasp* No Work Anymore!