Good suggestion, thanks -- I've just added an update to the top of the post, and mentioned it there :) Edit: just a note to say that I added this update to htt

Good suggestion, thanks -- I've just added an update to the top of the post, and mentioned it there :) Edit: just a note to say that I added this update to http://johnhammersley.com/?p=428 http://johnhammersley.com/?p=428 as that's where this HN story originally pointed to.