Possible sites to use for eBook publishing

Using a simple google search and the knowledge I have of what ereaders already exist I created a simple list of sites that I can use to do further research into what is available as well as which will best meet my needs.
The sites that I have found that I will do further research into and see what each does and does not do and at what cost (the downside of ebook publishing (like any form of self publishing) is that it involves the author essentially gambling for success in a very crowded marketplace).
http://www.practicalecommerce.com/articles/3264-12-Sites-for-Ebook-Publishing

1. Amazon Kindle Store
2. Barnes & Noble Nook Books
3. Apple iBookstore
4. Sony Reader Store
5. Kobo
6. Diesel eBook Store
7. Google eBookstore
8. Smashwords
9. BookBaby
10. Lulu
11. FastPencil
12. eBookIt

eBook Publishing: Overview for final project

I am currently working on a fiction project in another class and my co author and myself are planning to publish the final project in an eBook form so that it has more availability to the audience.  In order to get a better understanding of what that entails I will look into a variety of websites on the subject and see which publishing company may have the best options for cheap and effective publishing.