Converting a manuscript to Epub Ebook format

LuLu now offer Epub eBook format as an option for distributing via the service. They seem to imply that they have a service to create Epub format, I could not find it. WHat I did find was "Can I convert my manuscript to Epub on my own?". This had some suggestions for tools: Epub Tutorial, Calibre (Free tool), eCub (EPUB and MobiPocket books), Google Epub Toolkit. What they do not seem to have is an online sercvice like the Amazon DPT service which turns your HTML into a Kindle book.