MacRumors has heard from multiple sources that Apple is planning to release a (presumably free) Concierge app for the iPhone and iPod touch that would:
...provide many of the same functions available through the company's retail store online reservations system, allowing customers to schedule Genius Bar and One to One appointments from their mobile devices. Sources have also indicated that the application will allow users to keep tabs on their premium membership subscriptions offered by the company.
Since the current option is via the web (screen shot above), it sounds good to us. If wanted to schedule service or training for your iPhone, Mac, or other Apple gear, would you use it?