I've recently been in contact with Henry Rothwell from the Digital Digging blog. He's pointed me to a blog post he's done, relating to the story of the 'cinema' experience. See http://digitaldigging.net/blog/time-for ... tonehenge/
I mentioned that some of us (not me, sadly) were lucky enough to be involved at Foamhenge and had some experience of being inside the 'stones' there. Maybe those of you who attended that project would like to leave a comment on Henry's post - and don't forget to include the Journal URL in your comment!!