For posterity, here's the PayPal account that the payments on BTKoin.com are going through:

 - btko@yandex.com

How PayPal isn't on to them I have no idea.  Almost makes me think PayPal is allowing it to be able to track the flow of funds.

Anyway, others are asking about it.
 - http://bitcointalk.org/index.php?topic=117528.0