Ah-ha.. more research.

So yeah, I tried to link provided to get Microsoft to send out a 64 bit version of Vista, however for the product key it has to be a retail product key, not an OEM.

When I build this machine last year, I went to a local computer store to buy a copy of vista and the OEM 32 is what they handed me, which would explain why it was $120 versus $230 (for the retail at newegg or bestbuy).

After a return trip to the store they were nice enough to confirm the only way for me to get the 64 bit version to to rebuy the OEM version (64bit) for another $120... ugh, that's a bit irritating to say the least.

Oh well, so it's an extra hundred bucks added into the cost of multiboxing... damn you microsoft.