I just picked up the Process Text Group's ABC Amber ePub Converter. It converts ePub files to other formats including:
Italics and em dashes are preserved in most conversions (not in TXT, LIT, and PDB.) For those of us that do not have readers that use ePub it is a quick way to convert those files that are not available in out format and create them. It does not work on DRM files.
Note: This converter does not produce ePub files.
Priced at $19.95 (or less as part of a bundle), there is a free 30 day trial at http://www.processtext.com/abcepub.html
Full disclosure: I am not associated with Process Text Group, I have used their products for many years -- both the free converters and the paid converters.