Second this. I ran the snapshot from August (LMCE-1004-20120809105626326.iso), and the headless install itself took less than 15 minutes, which is GREAT!
However, after the end of the install, I added DisableFirewall = 1 and DisableIPv6Firewall = 1 to /etc/pluto.conf to enable ssh access. This went ok for a reboot, until I ran apt-get update and upgrade. I checked that my settings in /etc/pluto.conf were correct.
I restarted the machine, and additional updates were installed before login prompt, also an Intel video driver. After rebooting on its own, I can no longer ping it nor do I see anything on the monitor. (It uses HDMI though, so it could simply be that.) Currently, I am installing and NOT updating until there is a work-around:P
Is this related to ticket 1439 @ http://forum.linuxmce.org/index.php/topic,10992.msg88719.html#msg88719
Having no video is not much of an issue (it's headless), however, I will need network access (as will LMCE itself). Happy New Year, by the way!