I just started checking out IE8 which is now available for download.
It has some developer tools that probably will be useful in solving some problems. View source now has line numbers.
It now shows a spacing error I have on my site which showed in FF3 but did not show in IE7. Guess I will have to fix it now.
It also has a IE7 compatibility mode which will let you look at a site both in IE7 and 8.
