I have written about Qwiki before. Now Quiki has released an iOS app.
Qwiki takes information from Wikipedia and photos and media from several other sources and creates a 2 to 3 minutes presentation that gives a quick overview of a topic using text to speech.
The text to speech is very good, it only has problems with some names (especially kings with a roman numeral, e.g. Carl IV).
When I wrote this post, I was looking at version 1.0.2 for iPad. It requires iOS 3.2 or later. Available for free in the AppStore.
Tried with iOS 4.3.1 on an iPad.