Quote - ...though it does say duo core for mac users...mmm wonder why not for window users.

Probably is multithreaded then, it would seem silly to write a multi-treaded version of the application for Mac and then a single-threaded version for PC when both platforms supports the same CPU:s.
Anyway... about the 64-bit support, if available they probably would want to save that for one of their "reasons". I really wish they wouldn't play these games and just release all the info up front.