[Phssthpok]

OK. So bottom line, it's not something for everyone (which is why I originally suggested making it a prefs option which I and others like me could turn on).

At the moment I have a low-quality solution (the batch file I described earlier) which pops up an annoying console window when it runs; I could rewrite it in in a real language to prevent the annoyance, but presumably the "right" solution would be to rewrite it as a plugin which would start and stop when Calibre starts and stop, and wake up every so often to do my nasty magic tricks...

So, would this make sense? If so, I'll probably start bugging people on the plugins forum for advice on how to do it, such as plugin lifecycle issues and how to get at the auto-add directory...