This was announced
on his blog by Din Khachamovich, responsible for IE at Microsoft.
A video appeared on Channel9 confirming his words.
It is noted that the focus of the development of IE8 is given, on the one hand, to support web standards, and on the other, to ensure backward compatibility with web pages that were designed for IE6 and earlier versions.
Dean promises that IE8 will be shown at the MIX08 conference (March 5-8, 2008), and the beta version will appear in the first half of 2008.