I've been playing with Windows 8 on a Samsung 700T1A slate for a number of months and was quite excited with the Release Preview was announced and attempted to install it straight away. Unfortunately, I was unable to get it installed right away and set it aside for awhile, trying occasionally, failing, and setting it aside.
The problem I was having, was that the slate wouldn't boot to the Windows 8 media - DVD, USB, no matter what I burned it to, it wouldn't work. I even verified that the media was valid by using it to install on other machines.
Tonight, I finally got it working and the problem was both so odd, and simple, that I thought I'd post it here to maybe help someone else who comes along searching for the same problem.
It seems that the slate, when shipped, has a bios setting that has "Support for Legacy USB" devices enabled. However, as soon as the system is updated with a purchase date, it automatically flips this switch (presumably for faster boots). Unfortunately, this also causes it to not check for bootable USB devices during POST (cf. http://skp.samsungcsportal.com/integrated/popup/FaqDetailPopup3.jsp?cdsite=hk_en&seq=431318)
The post that tipped me off was this: http://skp.samsungcsportal.com/integrated/popup/FaqDetailPopup3.jsp?cdsite=hk_en&seq=431320
(image courtesy of Samsung)
However, the bios on my slate didn't look like this - there is no Fast BIOS Mode menu item. However, there is a menu item that says "Support Legacy USB Devices". Based on this article and the previous one, I took a guess that changing this would fix it and, magically, everything worked just as you would have expected.