As I'm a sad geek curious I downloaded the IE 8 beta, and it seems to work pretty well on MR, however not everything gets rendered correctly.
This is shown in the following screenshots. If you want me to do any further testing let me know.
Page change not in the right place at the top

Page change also not in the right place at the bottom

Posting form a bit stretched

Also it seems to have problems moving around the input box with the arrow keys, but I think that is a bug in IE 8 itself.
This is shown in the following screenshots. If you want me to do any further testing let me know.
Page change not in the right place at the top

Page change also not in the right place at the bottom

Posting form a bit stretched

Also it seems to have problems moving around the input box with the arrow keys, but I think that is a bug in IE 8 itself.