I went with Washington State, mostly because last year the started off losing to Portland State, so I'm not sure how in the world they would have overlooked a better Eastern Washington team, but they did...and lost while the world lol'd at Leach.
I like to wait until the end of the season to really decide what the biggest upsets were. It will be very interesting to see just how these hold up relative to the teams performances over the course of the season. But as a blind guess, I went with So. Alabama over Mrs. Sippy State. That one really floored me when I saw the score.