Robin Good: Booktango is a new eBook publishing service which allows you to edit, format, layout and distribute/sell your publication across major online eBook stores such as Amazon, Apple, Sony, Kobo and more.

Booktango has a free version as well as richer offerings too. The free plan includes:
- Free ISBN Assignment
- Online E-Book Editor
- Free Cover Design Service (Beta only)
- Sell Through Major Retailers

(You receive 100% of net royalties when you make sales through the Booktango bookstore and 90% when you make a sale through any of our distribution and retail partners.)

Paid plans add:

Formatting & Corrections Services
Interior Images
Choice Cover Design
Free Copy of E-book

U.S. Copyright Registration

More info on pricing here: 

Bookstore and samples: 

FAQ (truly exhaustive): 

Find out more: 

(Unearthed by Francesco Guglielmino)