Andrew Meggs posted in the MWA forum offering some enlightening information about Myth III for the PC's current status. Apparently, Mumbo Jumbo gave the Myth III Gold Master to Take 2 on October 16. Meggs goes on:

It's been duplicated, put into boxes, packed into huge trucks, sent to huge warehouses, repacked into medium-sized trucks, and delivered to medium-sized warehouses. Right now it's being repacked into itty-bitty trucks and delivered to retail locations. Patience -- itty-bitty trucks sometimes go at itty-bitty speeds on their itty-bitty tires.

Myth III still isn't in stores, but it should begin to hit the shelves within the next few days.