Lol Texrat,

That has got to be the coolest invention since canned soda ;-)

SenileBob: What you need is not a Maemo app. No simple application can make the rest of the system not start. An application does a) not have the privileges to stop many of the system services you see (like the xserver, methinks) and b) is only started after the initial GUI is presented, which is not acceptable for a full implementation of your criterion number 2.

What you need is a distribution modification, in which you basically remove everything but the xserver, gnome libs and firefox.

Alternatively, as I mentioned, you just replace the xinitrc and/or xsession files and the window manager.