Well, after a bit of random copying and pasting of RSS links, I have got some kind of feed visible in the sidebar column. But bizarrely, it bears no relation to the Tweetfeed I copied it from, and if you click through to the RSS feed itself, it bears no relation to that either.
In fact, I have no idea how these Tweets are being generated. Which leads me to think this may not be the added-value bonus that it is supposed to be.
I’m going to leave it up for a while, just to emphasise how tricky the web can be, and to remind myself how difficult it is to be clever. Let it be a lesson in humility.