Well I Mean The Signs Of Koth Website.
Wasn't it once kell.quaddicted.com ?
I know the community largely outcast Kell for not releasing his sources, but that site was kinda awesome nonetheless. It had a good codex of Quoth stuff.
Interesting - typing Signs of Koth into google shows Kell has a little site here:
http://www.fortunecity.co.uk/jodrellbank/tiptree/162/koth/
And he has been making a L4D map too!
But #1 result points to
http://www.quaddicted.com/webarchive/kell.quaddicted.com/
Which is a bit of a shame, cause it used to be a pretty website.