I for one am just excited because I've been using the PX-100 in a One Step camera, not an SX-70 camera. It works and i'm pleased with my results, but it is certainly not ideal. 600 film should be a lot better for me.
I don't know, I'm reading a lot of people down on the PX-100 film in this thread but I personally see all of this as very positive. I think a lot of photographers purchased the PX-100 "first flush" knowing full well that it isn't a perfect film, myself included. For me it shows a lot of passion in regard to the photographic community willing to pay money for something that has a lot of kinks but a lot of potential knowing that support now will lead to a better product in the future.
So not only kudos to The Impossible Project but kudos to those willing to stick their necks out and give it a try.