... and they took over the world! Or at least they took over quite an area of our allotment. See http://johnnorman.wordpress.com/2010/09/20/tomatillos-and-salsa-verde/ for details
That sounds familiar-I once posted on a garden site about them in answer to a question about `pinching out`. I think I said something like `forget pinching out prune them with garden shears` ;)