If you want X3 fast, probably best to get it straight from CW.
I ordered the upgrade from Sweetwater yesterday (Fri), shortly after the ad came up on their site.
Despite their claim to be able to get you the code in minutes, I have yet to receive anything - via email or in my CW account.
So, it would seem there was no coordinated strategy between CW and Sweetwater regarding early sales (before Monday).
Guess I'll be cancelling the Sweetwater order....
EDIT: Ended up calling Sweetwater and cancelling the order. I was told I was the first to order the upgrade.... Fat lot of good that did as there was no plan to act on any sales (of X3) before Monday! Oh well.
Ordering from CW now....