Calameo is a great way to publish your documents in a manner that makes them accessible across a wide variety of platforms including the iPad. Peter Vogel told me about Calameo a couple of weeks ago. I finally got a chance to try it out this week and I really like it.
Using Calameo you can publish your documents in a flip-book or magazine style with page-turning effects. You can add a background soundtrack to your document. You can also specify the sounds that viewers hear when they turn the pages in your documents. Your Calameo documents can be published and shared using Calameo's HTML5 embed codes (makes your document iPad compatible). Published documents can be annotated by content publishers and viewers (that option can be disabled).
I've embedded a sample document below. I did not use the sound effects option for this document.
Applications for Education
Calameo offers a nice way for students to showcase some of their best works. The annotation option could be good for having students comment on each other's works. You could also use the annotation option to compliment students on something that they did particularly well.