Just today I finally got a 64 bit version of Windows (the x64 flavor) going on my 2nd development box. I've just installed the CLR and the VC command line tools, and I'm itching to play with all things 64-bit. I'll probably start by building my PEDump code as a native 64-bit app.
Longtime readers of my MSDN column will know that x64 isn't my first 64-bit experience. Way back in the day, I ported most of the BoundsChecker core to the Itanium Platform, and wrote about some of the IA64 architecture for MSDN magazine.
My PEDump code should compile just fine, as I wrote and tested it on both x86 and IA64 way back when.