I extended support for operation on services:
now with

$> service [TAB]
915resolution foldingathome lircmd privoxy
acpid gdm mdadm rsyncd
[...]
you get the list of the services, and with

$> service networkmanager [TAB]
restart sleep start stop wake

you get the operation you can do on that service

to make this fully functional there should be a function like:

service() { /etc/rc.d/$1 $2 }
or
service() { /usr/bin/sudo /etc/rc.d/$1 $2 }

defined somewhere, but I'm not sure we want this in "bash_completion".