I went to the Chicago event today - the same story with only 32 bit disks. However I stumbled across a Microsoft employee with forms requesting an upgrade to 64 bit. I happily filled out the form and turned it in, keeping the bottom tear-off portion. It states "Windows 7 64-bit request. This is your proof that you have requested an exchange for a Windows 7 64-bit DVD. If you have not heard from us in a month, please email tne64@microsoft.com. Thank you again for your interest in Windows 7". My guess that this email address might be your only avenue to getting the version you need. I found this forum while searching the web for a 64bit iso that i could try my product key on.