re: your July 12 blog entry (http://southbros.blogspot.com/2007/07/largest-helicopter.html)
The helicopter that you have identified is not the worlds largest helicopter. The one in your photo is a MI-26, with about a 20,000kg capacity (see Wikipedia entry), and a max gross weight of 56,000 kg
There is a MI-12, of which only 3 were made. This helicopter holds the worlds record, with a total cargo capacity during one of its test flights of 44,205 kg (see Wikipedia entry), and a max gross weight of 105,000 kg. I don't think that any of them are flyable however, so that would make the MI-26 possible the heaviest/largest helicopter currently in service.