In case you haven't seen already, as announced here, IE8 Beta 2 can now be downloaded from

Why is this important?  Well, Beta 1 was for developers to see the new browser and test their sites with.  This beta is about everyone.  I'd really suggest taking a look at the IE blog referenced above and see some of the new features that are in this.

I haven't had a chance to install it yet, but it is on my list of things to do in the near future.