Since my first published story is due to come out as an e-book, I decided to make a little list of well-known and up-and-coming authors who had their start in epublishing. The list is by no means comprehensive - it consists of just a few names that came to mind right away. Some of these writers even have books out that you can find in your local supermarket - not just in bookstores.
To start (in no particular order):
Cheyenne McCray/Debbie Federici
Mary Janice Davidson
Jennifer Ashley/Allyson James
Lisa Renee Jones
(The following authors have made names for themselves in the e-publishing world and have quite a following, some of them also have their books in print)
Mackenzie McKade (she also co-writes with Cheyenne McCray, so you can find her in your local Barnes & Noble)
Maya Banks/Sharon Long
And let us not forget:
Jaid Black - she started Ellora's Cave to sell her own books and look at her now!