According to the information available the Internet Explorer 9 RC escrow build 8073 has been leaked and the x86 version is available on various torrents and file sharing websites. The complete build string is 9.00.8073.6018 (WIN7_IE9_Partner.110121-2300 ) .
Here is the screenshot of the latest Build-
and here is the screenshot of digital signature-
This version of Internet Explorer includes some minor UI enhancements and the download manager has also been updated.Further adding to it, Microsoft would release the RC version of Internet Explorer 9 publically soon and Internet Explorer 9 RTM is expected in March 2011.