BlizzCon attendees and Virtual Ticket holders will be getting first dibs on the new WoW merchandise at this year's BlizzCon online sale beginning October 11 at 10 a.m. PDT. Supplies will be limited, and everyone else will have to wait until BlizzCon ends on November 9 for the chance to purchase.
One of my favorite pieces of merchandise from past BlizzCons was the 1:4 scale Arthas helm. It makes a fine desk ornament. Hopefully they will have more of them for sale this year.
To access the sale you will need to log in to the store with the Battle.net account associated with your ticket purchase. Head on over to the official BlizzCon site to see the full sale preview.