A German author has come up with a new kind of reading experience — a “libroid.”
The “libroid” has no pages and therefore no page numbers — readers keep track of their progress with the percentage of the text they have already read. Authors can add to the text whenever they want.
“Some authors will write round books with endless stories without a beginning or end,” Neffe added.
My head spins.
No mention of what these will be compatible with, device-wise.
Mike Cane’s xBlog 
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We already have these. They’re called “blog subscriptions” and they are delivered to the Kindle several times a day by Amazon. :)