Per this
CNET article, looks like IE's market share has dipped below 90%. I am not sure how many months IE share has been on a decline, but this is certainly an interesting trend line to keep an eye on. I haven't felt a lot of panic or uncertainity inside the corporate walls, so I am not sure how much this is viewed as a bad thing vs. we have too much Longhorn stuff going on to really pay attention. At the end of the day, I wonder if Microsoft should really care what browser is being used as long as its being used on Windows? How different that would be from the browser jihad of the late '90s.