Someone leaked the "WindowsDeveloperPreviewOnlineSetup.exe" file that was used for last weekends: Private "Win Developer Preview Install Fair"
I snagged a copy & ran it in Windows 7 x86 (it Dl the x86 flavor) & last night I ran it again in VMware > Windows 8 DP x64 (it Dl the x64 flavor), amazingly it's still working.
I saved the installation media as an .iso also flash drive is a choice too.
I installed the x86 flavor yesterday on a test rig & was happy to find-out that it appears to have a few bugs fixed among other changes even though the build # is still 8102.
Besides creating the install media it also created a desktop shortcut: "Install Windows", I didn't run that as I ran the Dl.exe from the Main Rig & really don't want the hassle of possibly messing something up there w/ a pre-beta build.
Also there are many new folders & files added to the "C" drive, running a earlier restore point doesn't remove them
The Dl includes a product key but none is required to install the OS or activate it, I found out.
One of the 8-9 windows one sees