Save object positions to file

Hi all,
I was trying to do an animation where people can move object around and save. then other people, with different computers, can see the last modifications.

I was thinking using the sharingObject remote, but does it work with all servers?
I read I need a special one, flash development server or something.

So, I had the idea to make a script that save the position of the objects to a file and realoading the animation it loads the variables from that file.

but how the script in flash would be? :wasted:
I know some php, but I don’t know much actionscript.

thanks all