I have to believe this work would be very low priority for Fictionwise's coders.
Even if they could deliver ePub, surely the DRM issues would be killers. And I don't see them doing ePub just for non-DRMed books. So, much though I'd love to see this, I'm not going to hold my breath.
Rob Preece
Publisher,
www.BooksForABuck.com
(and eBookWise owner/user)