Got an email from these guys and here’s the skinny. ODFToEPub will convert OpenOffice documents and has the following list of features:
* Generates table of contents with navigation control
* Generates hyperlinked alphabetical index
* Tables
* Itemized and numbered lists
* Images
* Styles
* Footnotes
* Bookmarks
* Cross-references
* URLs
* Automatic header numbering
* Numbered paragraphs
* Cover pages
* Running headers and footers
It costs €39, but you can request a free 15 day trial license. The details, including some videos, are here.