Thanks, Letti. I've checked the listing and preview closely and I can't see anything I've missed. I went through the new listing process carefully and think I clicked "List your property" or something similar at the end. But then I got that email telling me to "Publish" my listing with no further instructions.
One thought: the listing will not be available for bookings for another week or so. Is it possible that the listing will not appear in searches until the date when it is available? I've tried doing a search using available dates (having logged out of my account) and my listing still doesn't appear.