Good list. I don't work there but recently got the incredible luck to be invited to a VIP visit of the LHC and a few other things.
My own personal comments:

1) While in the "Microcosm" museum, be sure to pay your respects to the first ever WWW server. The NeXt cube used by Tim Berner Lee is exposed there :-)

2) When you take pictures of the ATLAS experiment, you may want to have a few people in the shot, otherwise it will be hard to tell the scale of that thing. It is really huge.

3) A word of advice: get there VERY early. Last time CERN had a open-door day, it was packed, and I mean PACKED. Access to the underground tunnels (coolest thing to see) had to be closed early because of the huge lines to get in there. Since this will be the LAST chance to see them (as mentioned before, they'll be quite radio-active once the LHC is turned on) I think it's a fair bet that they'll be even more popular this time.