It's been awhile since this thread was started, but in case anyone still needs it, I have a work-around.
I had a slide with fairly complex motion paths (call it slide #1) and I wanted the next slide (slide #2) to start with my objects in their "final-positions" (after the movement). Here's what I did:
1) I made a duplicate of slide #1, then moved my objects to their final-positions. This becomes slide #2 (I also selected all the objects and changed the text color, to help keep track of what I was doing).
2) Next, I copied all of the objects from slide #2 and pasted them back into slide #1. This way I had one slide with objects in BOTH the starting and final positions.
3) Working from slide #1, I carefully made my motion paths go from one fixed point in starting-position to the same part of the object, but in the final-position. It took a bit of practice, but I was able to move an object from it's starting-position to it's final-position fairly easily. The way I could tell if it was working was if the two objects superimposed, after the motion.
4) Now I removed all of the "final-position" objects from slide #1 and left the "starting-position" objects in place (with their motion paths).
5) Finally, I went back to slide #2 and changed the colors back and set a slow fade transition (3 seconds) into that slide (in case any of the positions didn't EXACTLY match up, this masked the movement fairly well).
Now when I play the slides, slide #1 has all the motion and slide #2 has the objects in their final positions.
Hope this helps!