About 900 for the prejuding, close to 1,300 for the finals. From various sources. This year, I will be there, and take a picture of the audiences for all. But one thing I heard of the show last year that it was a great production, and lots of people enjoyed the expo and the contest.
I am pretty excited for this year's show, will actually be going, having fun, eating Orange Chicken, and taking a mini vacation in Colorado.