I have to admit, I was rather shocked at this statistic
All Microsoft browsers combined are only 32%.
I've not tried IE 8 yet because, being a web developer, it's not in my best interest to have a browser that only 3% of the population uses. Now, I don't know if parallel installations of IE can be done or not, generally you get one version and that's it (unlike Firefox, which you can run every version all at the same time). If there's a way to do that, I could install it, but until it gets a bigger market share, I'm sticking with 7.