Typographers are not enthousiast about the lack of good font support on the iPad.
What the iPad is Missing (No, it’s not a Camera) By Fontshop
Never the less, as interaction designer myself I do embrace the use of web applications. Why? Is iBook important? No! It’s not useful at all. Publishers should come out of there cubicles and explore the best way to present digital media: THE WEB!!! We are allready helping you a decade, developping better ways of presentation for digital media. It’s opensource and userfriendly.. Don’t miss the boat!
Nice article by ‘Guru’ Zeldman on developping for iPad (eo):
http://www.zeldman.com/category/usability/
Here you can generate your font code for web, all browsers: