Well, I have screwed up, and I beg your forgiveness.
I went to the post office to get an envelope to send with my blocks, and when I returned to the post office yesterday to mail the package I was thinking of that envelope -- thinking it wasn't right.
I had the packet weighed and paid for the postage with only jclingenrey's name on it, no address, intending to finish the address and drop it in the slot. THEN I dropped it in the slot.
Today, my (dear) post office returned it to me so I could add the address. AARGH.
However, I'm happy they returned it to me! And I'm happy to say now it's REALLY in the mail. Only going one state away, so I'm hoping it will be there promptly.