Users can download the first Beta of Internet Explorer 8 for Web developers and Designers.
Internet Explorer 8 Readiness Toolkit : http://www.microsoft.com/windows/products/winfamily/ie/ie8/readiness/Install.htm
Exciting features include Activities and Webslices. Activities include doing a contextual search from something highlighted on a website. Webslices are the ability to track a specific section of a site, like a custom RSS feed. So you could make a button on the top of your browser that tracks an eBay auction or the status of our friends on Facebook.