Try out http://www.microsoft.com/windows/products/winfamily/ie/ie8/default.mspx

I demoed this a few weaks ago and to be honest, I'm impressed.. Yes, Yes.. so some of my client sites are broke in IE8, but compatibly mode worked just fine. So developers/designers don't fret, you can explicitly choose ie7 or ie8. Standards are an issue, but the idea of legacy rendering by default is highly appealing.

Whats more is I'm looking forward to using the "offline" mode.. how great is that, no wireless hotspot... just keep on working. Yeah, I haven't looked at the how yet, but the wow is now.

Dean Hachamovitch presentation and commentary on IE8 @ sessions.visitmix.com - keynote (approx timeline - 27min 40sec).