We've just completed a redesign and refresh of the IE Developer Center on MSDN. The goal is to make it easier to find IE related developer content and even includes an updated photo of me with the neon blue 'e' behind me that you can find in the lobby of our building on the Redmond campus!
We've worked to make some of the essential links such as reference material easier to find and we will be promoting different content on the front page regularly making it well worth visiting on a regular basis or subscribing to the RSS feed. We have also made two MSDN forums to get support for web development and extension development for IE. These will be great resources if you have questions and people are encouraged to answer anything they know the answer to. If you have bugs to report or feedback to provide the links on the support page remain the best place to go.
Some articles along with numerous reference pages have also been updated with IE7 content over the last few months. In particular the Zentech page demonstrating the CSS improvements in IE7 is now available.
As always all feedback on how we can improve documentation is appreciated.