The Blizzard Store has been closed since late 2013 but, as of today, has reopened under the name "Blizzard Gear". As expected, the site features clothing, artwork, toys, etc. Interested World of Warcraft players can also get their hands on a physical authenticator for account protection. Most interestingly, there is a new "Caverns of Time" section that will allow players to get hold of Blizzcon items from years past.
Check out Blizzard Gear.