Funkybot,
If you purchased "X2" directly from the Cakewalk Store as part of the Pre-Sale promotion, then you should already have your serial numbers & downloads.
If you purchased "X1" prior to the Pre-Sale as part of the "Buy X1 get X2 Free" promotion your downloads will be available at a later time. If you purchased X1 through a retailer or the Cakewalk store starting August 1st, and registered, you'll be eligible for the free upgrade to X2 as well. The process for these folks will be that they "purchase" X2 for free through the online store.
jma,
You have a few email addresses on file. Try your @verizon email... it seems to let you in w/ that one.