Serask
It wasn't updated since Feline Oddity took over because I don't think she had enough time. FelineOddity always had central power over the SIN, she was the last active founding member of the guide and almost everyone knew so. Even when Feline was inactive as an updater, I, myself, as well as several other staffers, updated it.
King is correct, it died due to a general loss of interest. I've pitched the idea of a new price guide/revival of the SIN scheme to Feline, but as it stands, it's definitely gone. There are enough guides as it is, it seems you're no one in the Exchange unless you personally found a 'guide.
Hilarious.