For all of you who have an iPhone and just can't get enough of WoW, Blizzard has released a new app. It is called 'iPhone Remote AH' and is currently running the beta phase. It allows you to keep an eye on the browser for all of the AH trades. But if you want to buy something yourself you'll have to pay. The 'World of Warcraft Connect' subscription costs 2,99$ per month.
More information and screenshots can be found on the WoW homepage: The World of Warcraft Armory