Related, slightly OT, but maybe of interest:
http://www.enricozini.org/sw/nodm/
"is an automatic display manager which automatically starts an X
session at system boot. It is meant for devices like smartphones, but
can be used on a regular computer as well, if the security
implications are acceptable."
James.
That's a nice one.
I personaly use a VNC server to start audio apps on boot like jack-rack after jackd.
Thanks,
G