Had to post a response to someone on the Kerberos forums( http://www.kerberos-productions.com/forums/viewtopic.php?f=56&t=52788&p=534244#p534244 ).

Proteans are a property of Kerberos productions. They also normally don't wear top hats.

Oh, and they tend to be the cause of nigh-ancient civilizations which have created them(... juuuuust a bit like the Shoggoths which might have inspired their design)