Not sure what you mean -- there's no "$49 download / $59 complete package deal."
busterkeaton is referring to the early-bird discount in which, however you buy Vegas, it's about $100 off the regular price. For example, someone upgrading from Vegas 6 to Vegas 7 can download the new version for $135 or get it on CDROM for $149. After today, it's about $100 more.
As for your situation, if you bought and registered Vegas 6 recently, call Sony customer service. Chances are pretty good that they'll give you a free upgrade to Vegas 7.
"Now save $100! Through November 3, upgrade from any version of Vegas or the Vegas+DVD software to the new Vegas+DVD Production Suite for only $149.95."
I just upgraded a few days ago. I had purchased a copy of Vegas 6 (without DVDA) from B&H a month or two before V7 was released. Got it on sale for $129. Then I got to upgrade to the v7+DVDA4+AC3 for only $149. Total price for the latest complete Vegas package ? $280. As Borat would say, "Nice".