Neowin.net posted a news story that a HTC 7 Mozart ROM with non-final NoDo update has been leaked on the Internet
The leaked Mozart firmware build 7355 isn't the final release of the Windows Phone 7 NoDo update, which is expected to have a build number of 7389. Since this is a non-final build, we encourage users to simply wait for the final and official release from Microsoft before proceeding with the update.HTC 7 Mozart ROM with non-final NoDo update leaks