For those who attended Dan Walsh's talk on confining the user, you can find the slides here. Quite a few people expressed interest in them during the talk, and Dan sent them to me for some reason, so there you go.
Btw, my MacBook seems to never work with projectors (thanks to Paul Moore for lending me his laptop for the talk). It's relatively recent and has the following graphics stuff:
00:02.0 VGA compatible controller: Intel Corporation Mobile 945GM/GMS, 943/940GML Express Integrated Graphics Controller (rev 03)
00:02.1 Display controller: Intel Corporation Mobile 945GM/GMS/GME, 943/940GML Express Integrated Graphics Controller (rev 03)
Nothing seems to work: rebooting with the cable attached (VGA text mode works, but not X), exhaustive messing about with xrandr, hitting the laptop with a hammer etc. Does anyone know something else I can try?