Here is the browser market share for July 2008, based on traffic to my top site:
In July, Firefox gained 1.19% in market share, at the expense of the other 4 browsers. IE was hit particularly hard, losing 0.88%. Last month I had mentioned that it was somewhat surprising that Firefox did not gain share despite releasing Firefox 3. It appears the word has finally gotten out this month, and more people are trying the latest Firefox browser and are sticking to it.