So far, Apple has sold more than 3 million of its iconic iPads, making it the best-selling tablet on the market. A runaway success? Absolutely.

But an out-of-the-box iPad can be a disappointment for business tasks. Its rudimentary word processor, e-mail client, contacts directory and calendar are slim pickings, especially for those who want to use the device for work on the road.Thankfully, Apple's App Store has a good variety of software designed to help business people get through the day.