I was able to have a bit of a play today and also attended the presentation by CPS, so have some insights from the UK CPS rep. I'm planning on doing a writeup fo rmy blog, but I can upload it here as well when it is done. The card slots on the cameras on display were taped up, as they were pre-production models still, so I couldn't but my own cards in, but I was able to do a quick and dirty comparison with my 5D MkII on the back of the screen. Incidentally, I also had a quick play with the only 200-400 in Europe on a 1D MkIV.