Actually, it is I who am no longer snowed in, and my Apple Airport Express is back to work! It's still under warranty, so I took it to IT Worx, a certified Apple Reseller and Service Center, and they fixed it. It was a configuration issue. Boy, do I feel silly.
Even though I had three Netflix DVDs at home, I immediately watched a movie on my Roku. It was such a relief to have it back online. My Roku gave me the welcome message telling me that it had been upgraded. I changed my display settings to HD, but I haven't tried watching an HD movie yet. There aren't any in my queue. I still can't see the Amazon menu, which is supposed to be along soon.
I should confess that, in my desperation, I went to Video Review, the best video store in Greensboro, and rented a couple of DVDs to carry me until I could get my Airport working again.