12-months later and Bing still hasn't included any feature similar to instant search, however, during Apple WWDC 2010, Bing showed off a brand new version of the site, powered by HTML5 with some very exciting and cool features.
The early future Bing preview showed a smooth transition between your query and your results, a feature close to instant search. The HTML5 version of Bing also included a quick tab preview of weather, maps and other features just by hovering over the menus, reducing the amount of clicks and page loading.
The video also demonstrates a brand new mobile version of Bing, including endless image scrolling and seamless transitions between images, all using the iPhone or iPod's touch screen. The mobile Bing preview also includes the background image, giving the appearance of a native app, all within Safari.
Bing in HTML5 could be Microsoft's response to Google's instant search, and we could likely see this being released by the first quarter of next year, right around the Internet Explorer 9 launch.