Windows 7 Tip: 
Microsoft researchers are working on a new browser called Gazelle which it promises will have some impressive new features and capabilities. Gazelle, relies on a “browser kernel” (5,000 lines of C# code) that helps enforce security rules to prevent malicious access to the PC’s underlying operating system.
Gazelle is different from some other browsers in that it considers each part of a Web site — such as iframes, subframes, and plug-ins — as separate elements. Some of those elements can pull in malicious content from other Web sites. Google’s Chrome runs a Web page and its elements in a single process.
Another interesting feature of Gazelle is aimed at blocking so-called race condition attacks. In that scenario, an attacker creates a Web page aimed at making a user click on an area of the page. But just before the predicted click happens, an overlay is drawn into the page, which could cause a user to be attacked. Gazelle will ignore any clicks in newly exposed screen areas for about one second until a user can see the new screen areas.
Source
Interesting…when is this due out?