My order did become available approximately 3 hours after talking to the last support person (I received an autmated e-mail saying that my order had been processed with instructions for download). It was a standard retail upgrade to a standard retail version of LR 4. I'll leave the order number question as this is a public forum.
My problem has finally been solved; however, I do hope Adobe reviews their online purchase/download system, as having to wait 3 days for a download purchase to be available pretty much defeats the purpose, and is not very customer friendly. Thanks for replying.