I'd also joined Bark.com, a site that claims to unite people wanting a service and people providing it, at the suggestion of a pianist friend who had found that useful in getting piano pupils. After spending something like a hundred and fifty quid in the 'credits' that you have to buy before hand, I haven't got one single pupil from that source (although there is one who _might_ start lessons in the near future, so there is that too). So Bark didn't bite.
Still looking for alternatives... I'm on Dreamwidth at http://flaviomatani.dreamwidth.org/ -do follow me there if you can.