I went on the Friday. It was raining, but the walk up from the tube past the museums was the more atmospheric for it. The ticket was in the form of a CD sleeve, ostensibly for the recording that might be on sale at the concert (calling it a "gig" feels a bit wrong with all that wood panelling and atmosphere of days gone by). I kept mine in pristine condition, even though no CD was forthcoming at the time.
As a concert I found it a strange hybrid, and it certainly made me think more and listen to the music in a different way. It has definitely grown on me since. I was listening to it the other day whilst making up random numbers for my tax return and found it inspiring. The concert's visual accompaniment, though, didn't do it for me (and I'm being careful, as I gather this is a delicate area of conflicting artisticm sensibilities): the original pictures - from the Royal Geographic Society archives, some only recently unearthed (geddit?!) from dusty years in the vaults - on which the video show was based were stunning, glimpses of a world gone by through eyes now closed, and Billy chose them well, but the applied treatment - a little like the "reflected" effect at the start of the OSD video - lost a lot of the spirit and atmosphere for me and added distortion and confusion; but then I am rather sentimental in my tastes, and the overall effect was perhaps more appreciated by fans of the abstract. My comments are purely subjective, not objective or absolute.
I'd certainly like to see Mr. Currie live again, whatever the venue. Maybe we could have a quick poll to see who'd commit to a soiree, were one to be forthcoming, to demonstrate that it'd be worth his while - put a business case for it, in other words ?