I haven't played with it yet either - but from what I have heard and read it looks like it is moving in the right direction.
Yeah it is! it has some very nice features like you can translate pages instant.. And it have a Developer tool for webdesigners, and of course some other stuff.. Its just that it works kinda bad right now but you can emulate to IE 7 if you want.. And one of the best feature of the Developer tool is that it emulates your site through IE 5, IE 7 and IE 8 and then you can see how it works i love it!
My website works actualy pretty good with IE 5!