I posted in KSD's thread that I have Windows 7 I'm willing to sell, and people keep PMing me wanting to buy, and when it's time for them to send me payment, they get scarce.
So I'm putting it up here explicitly. It's Windows 7 Ultimate. The 'official' DVD is 32-bit. I downloaded and made my own 64-bit DVD, which is included.
It's all legit -- the product key is good for BOTH 32-Bit and 64-Bit versions. Proof from a quick Googling http://answers.microsoft.com/en-us/windows/forum/windows_7-windows_install/32bit-to-64bit-with-same-product-key/3a108aea-7226-4144-b621-a584b38b6d2c
This is the full version.