Well ok, I think I have a simple solution. Just make a sub script that calls the binary, and writes to a file when it's done, checks to see if it's the last one to chip into the output pool, and if it is, exec the parent script again. A little ugly, but not kludgy enough to make me shudder... Sounds good, but I'll need to be careful about atomicity in checking/writing to files...any pointers would be apprecaited.