Anyone who needs to hire a line-sitter for the cancellation line should contact linestandingnyc. They're on Twitter. The rates are better than any of the other services and they specialize in front of the line.
I've given up thinking I'll ever manage to get lucky with the cancellation line on any of my limited trips to NYC. Going to try to grab a ticket tomorrow when the pre-sale begins for the next block as I'm planning to make a trip in November. BTW, ticket prices seem to be increasing a little bit - according to Ticketmaster they range from $139-$199 (unless that's the same as the last block they released?).
I was lucky enough to see the OBC back in August (at face value) so I'm a little more gun-shy on paying these crazy resale prices.