Thank for finding that, yes that's the one. It was incredibly accurate.
I'm in two minds about the fact it's down.
1. It's probably a good thing that it isn't super-easy to quickly find everyone's alternate accounts.
2. The capability is clearly there and the technology is out there, but now in the hands of the few people who bother to re-implement it.
It was a useful tool for highlighting the naivety of believing that throwaway accounts were a real possibility when stylometry analysis is so relatively cheap to do.