In my experience as a software dev the "ambient information" that has tended to be most valuable was information about how the product was doing financially. I worked in an environment where we all had offices with doors and it was great but the "ambient information" I missed was that the sales of the product weren't going all that great and there were layoffs on the way. In a cube environment I think I would've heard a lot of chatter about layoffs coming weeks to months earlier. In this case I was pretty much blindsided.