I want to begin by saying I hate IE6 and despise IE7 and begrudge IE8 as much as the next web guy. I would love to chuck them down a black hole and ban Microsoft from ever making browsers.
But recently, Microsoft have kinda redeemed themselves a bit. "Have they forced IE6 users to upgrade?" I hear you cry. Sadly not.
I'm talking about Microsoft's new SuperPreview software, which allows you to easily view a web page in IE6, IE8 and IE8's compatibility view (essentially IE7). (Note: depending on your current IE browser depends on which browsers you can view.) There's a ton of cool features included, like viewing them side-by-side, viewing them overlaid (which can give you a headache pretty quickly), analysing sections of code like Firebug does, and some more cool things.
I've already used it twice today, and it works quite well (despite being in Beta). You can read more about it and download the software here: http://expression.microsoft.com/en-us/dd565874.aspx
Finally, Microsoft makes my day a little better.
Darren