Ok well i can answer question 3 due to my
thread posted
It is basically, it is only intended for one computer, and legal for 1, but is illegal to install on two or more, but MS dont stop you.
Oh yeah and question 2, yes it can work on 64bit versions.
Fine I will answer 1, since I have done both

We are all entitled to the pre-order offer, especially us beta, and R/C testers, but it is open to the public too, only if they know that is, pretty snicky of MS eh.