The day that thousands of testers have been waiting for appears to be just one day away.
Winbeta are reporting that Windows Longhorn Beta 1 will be released to testers tomorrow. I spoke with somebody who has since confirmed this information as accurate, it's unclear what build will be shipped but Winbeta are saying 5112, only time will tell.
Beta 1 will not hold the name Windows Vista, that will be reserved for any build after last friday, and will most likely start appearing in builds closer to Beta 2.
Winbeta also say that MSDN subscribers will have access to this build by August 3rd, making the notification on the Windows Vista homepage on Microsoft equally accurate.
Update: Looks as though Beta related sites are going live already. Links to the Vista Pre-Release and Internet Explorer 7 privacy statements can be found below. The Vista notes reveal some of the new things we can expect to see come tomorrow including a "Games Explorer" (Thanks to Hurmoth for pointing this out)
View: Microsoft Connect (Registration Required)
News source: Winbeta