We now have furthermore heard from third party sources that the build will be 8100. Simply one question stays, will Microsoft make Windows 8 available only to attendees of the conference, or perhaps could it be available on the web? Formerly, at Microsoft’s PDC meeting in 2009, the company offered away copies to delegates however the public could not get hold of the actual pieces till the OS reach beta.

Here are some the screenshots posted in My Digital Life forums showing the build likely to be 8100

We have only 24hours Microsoft hitting off  the highly anitcipated conference on September 13. We be posting all the news as we are covering the event live.