Rudolf Psenicnik has created an awesome app to track characters on your iPhone or iPod touch. Warcraft Characters
2.0 allows you to to view gear, overall spec, reputation, and basic stats on the fly. Simply enter a toons’s name and view information from Blizzard’s Armory!

Here are some screen caps of my toons:

Character select screen

Character Details

Item view

Visit Rudolph’s site for more details.