Here is what the new firmware of the Cybook present on the Weltbild-Cybook offers. Remember, this is only in Release Candidate status. There are pros and cons, so beware.
Pros:
1: The epub rendering works and seems to be rather fast
2: The Cybook is able to render fully justified epubs
3: The PDF rendering is way faster and better than the old version
4: Folders are supported
Cons:
1: Bad rendering with tables. Hopefully that's just a bug
2: Zooming in PDFs only going from 50-100%
3: No support for Mobis, Html or Text on this one so far
4: Seems not to be really stable for now
5: Cybook has been loaded with Mobi sample files
Will be updated as soon as we know more. Thanks to all the fine users at the German forum that helped me with this.