I'd like to know as well. I only have one so far (eBuddy) but there are bound to be other apps that I would like to auto-start on boot. Ebuddy doesn't have the option in the settings at all so some way of doing it myself would be good.
Similarly, any way of stopping things like Amazon MP3 from starting up at boot time? Can't imagine WHY they insist on making it run all the time.