The announcement itself is here
http://www.tthfanfic.org/
The detailed (and in places hilarious) explanation of why this happened is here
http://forum.tthfanfic.org/index.php?topic=4775.0
As may be obvious from reading the latter, there is a right way and a wrong way to cope with stuff like this - I hope that I handled it correctly, as for the other author...
later: And the explanation thread has now got even sillier ;-)