Dear all,
on Monday, I was notified that CERN have started to put some images under Wikimedia-compatible licenses: https://cds.cern.ch/search?ln=en&cc=Creative+Commons+Images+from+CERN&am... .
They are starting with a really small batch to test the ground (just 21 files right now, of which three are already up at https://commons.wikimedia.org/wiki/Category:Media_from_CERN ) but there is hope that this will be scaled up soon.
Cheers,
Daniel