We all know that many things that we must do with photos can not be done with
f-spot, for example, RAW->JPEG conversion, level adjustments, proper unsharp
mask, ... For all those function we all rely on GIMP, thus it would be very
useful to see in F-Spot such sequence of actions possible:
1. Select an image
2. Execute "Edit versions in GIMP command"
3. Image is copied to IMAGE_dynamic.JPEG (or .CR2 or whatever)
4. User is told to just save when ho has a good intermediate result
5. GIMP is launched on the dynamic file
6. A F-Spot thread monitors changes in the file
7. User does some changes to the file and saves it (with File->Save)
8. F-Spot detects change, waits until write is complete and copies this copy of
the file as a new version
9. User does another change, saves again
10. Another version
11. User exits GIMP
12. Another version
13. Separate thread and the dynamic file are cleaned up.

I am not sure what to do with RAW files. We have a .CR2 file in the beginning,
but the very first intermediate save will propably be a JPEG. Maybe F-Spot could
just monitor IMAGE_dynamic.*?