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We are NOT affiliated with Apple, Inc. in any way. We just happen to like the software and would like to provide accurate information regarding the possibilites of the software as a public service. Any information provided by this website is provided as-is, is subject to change and is unofficial and not endorsed by Apple, Inc, CA.
Video courtesy of [http://www.beedocs.com/|Beedoc]:
Here is a list of available fonts on iOS 5.
Baldur Bjarnson's blog has an in depth-analysis of all the widgets provided. Note that the HTML widget can display animations and also play back video and sound files, yet with no DRM. However, since it is the built-in Safari browser, it does support additional media types like panoramic movies and mp3 streams for instance (see HTML Widgets).
ClassWidgets offers custom widget development for iBook Authors.
There will be more information about the individual file formats used by iBook Author, but for the time being, Daniel Glazman has a pretty good overview of the different files and the formats being used.
More information about the ibook format can be found at Baldur Bjarnson's blog.
Available only in the US iStore (see also this page):
Your resulting iBooks can be exported and submitted to the iTunes bookstore. You can also put them up on a website for free distribution.
So generally speaking, if you would like to make money of your book, you need to go through the iTunes bookstore.
If you prefer to distribute your iBook freely, you can put it up for download on a website.
ITunes Bookstore accounts are free, by the way.