There's a hangup with it--epubs are normally done as 1 html file/chapter, with a metadata file connecting them all together. (In part 'cos they can; in part 'cos some software--Sony's, I don't know about others) doesn't allow more than 300kb/section.)

So they don't convert neatly to .imp; you have to consolidate the html files somehow. But yeah, the content is all accessible.