A very nice writeup on what’s new in IE8 by John Resig (jQuery). Lots of good stuff but this one caught my eye:

Firebug for Internet Explorer

We finally have a heavily-Firebug-inspired tool inside Internet Explorer. To quote Joe Hewitt (creator of Firebug): “I couldn’t be happier that Microsoft completely copied Firebug for IE8.” I have to agree – a tool like this has been a long time coming and it’s greatly appreciated. Only the Internet Explorer team would’ve ever been the ones to build this tool – there’s simply too much information here that’s unavailable to typical IE extensions.

If this works as well as Firebug it will make everyone’s life much easier!!!