Just so you know, Amazon came through. After arguing with the original Amazon Marketplace seller, Chitek/CTCStore that yes, the "Sony Memory Stick PRO-HG Duo HX 8 GB Flash Memory Card with USB Reader MSHX8G" did indeed come with a USB adapter/reader as indicated in the item name and product description (they actually argued with me that what I ordered was a "promotional item that did not come with an adapter/reader"), I filed a claim through Amazon's A to z guaranty service and they found in my favor and refunded my money to me. In the meantime, I ordered the MSHX8G from another Amazon seller, Dependable Resources, and which was "fulfilled by Amazon", and lo and behold, I actually received what I ordered today. Excellent - just in time for a family wedding.
Now we have to see if Chitek/CTS Store actually refunds my return postage as they promised. I am waiting to see - if they refund it I will not leave awful feedback - if they fail to, well, they can just wait and see what I leave.
Kudos to Amazon, though, for stepping up and doing the right thing.
Have a happy Fourth of July all, and take lots of photos!