moving file from one server to another

hi, i have thttpd (a very light weight http server) running as an image server on one box, and users uploading images to another php/apache powered box. I need to let users upload to the regular LAMP box, but then copy the image over to the custom image server (which does not have php or any kind of cgi capability). I was considering using exec() and scp to do this, but thought i'd ask and see if anyone had any better suggestions? many thanks -- Nick Wilson http://performancing.com/user/1