This is the only World of Warcraft iPhone App you’ll ever need. Blizzard has just released World of Warcraft Mobile Armory [iTunes], which gives players of the game full access to the Armory. (The Armory tracks player and item stats and the like. It’s essential for “real” players of the game.) So add this App with a few trips to WoW Wiki and Thottbot, and you’re a mobile WoW warrior (but not necessarily Warrior).
The App is free, of course, and works on your iPhone and iPod touch. (I don’t have either, so I can’t try it out.) It’s locked into your actual WoW account, too.
Even beyond just looking at your character, and your realm’s top character, while waiting for your Supercut, I could see having it at your side while actually playing the game. No having to minimize and all that.