Today’s app du jour seems to be Qwiki, a fascinating iPad app making its debut in the App Store. It presents Wikipedia information in a unique way that is perfect for Apple’s device. Besides, its backed up by a Facebook Co-founder, which doesn't hurt.
If scanning through Wikipedia pages to research something is too much of an effort, Qwiki, an upcoming service that's a cross between Wolfram|Alpha and YouTube is definitely for you. Best of all, it's coming to the iPad.