I put this request out on twitter a little while ago but it doesn't seem to have produced an ebook (perhaps I should be more patient).
Epub3 is the new ebook standard (it's due to be approved early next year), and it's great and all. But how well will it work on the many existing ereaders? That's what I want to find out.
I'm looking for an Epub3 ebook that has some or a lot of interactive components, active content, or basically anything that you can do in Epub3 but not with the existing standard. I want to see how well a 3pub ebook works on existing hardware. I could probably make one, but I don't know all the nuances of Epub3. I'd like to avoid introducing invalid content.
My stable of ebook readers is quite large, and I'm planning to try the new ebook on most of them. I'm really curious about how each device will respond when it's given strange content. I could make a few guesses, but data trumps hypothesis any day.
If you have an ePub3 file handy, please share.
Update: I've just been pointed at this page. It has a number of sample Epub3 sample files; I'm going to try the Moby Dick one first.