I'm preping my poetry for ePub. Basically took what I had in xhtml, scripted through into a single file with some of my own meta data stuff in there. Then ran through tidyhtml to really clean it up. Then use calibre' html2epub tool to convert to epub. Sadly as the only app I have for checking the work is FBReader which apparently LOVES to gobble up empty lines which is just annoying I won't be releasing that anytime soon.