In the face of endless IE vulnerabilities, viruses and security issues such as IE, Bill Gates announced at the RSA meeting on February 15th.
Development of Internet Explorer 7.0, in August this year, IE7 will be integrated as part of the upgrade in Windows XP Service Pack 2.
Internet Explorer 7.0 adds a new security level and provides powerful anti-chementing features for a variety of Spyware software, but there is no new change in CSS improvements and core rendering engines.
IE official BOLG on Internet Explorer 7.0 (English): Post on the official internet explorer Weblog