At the recent Self-publishing Book Expo in New York City, Amazon’s Jason Kuykendall admitted to owning both a Kindle and an iPad.
(Don’t tell Jeff Bezos!) He already knows, and should because this is a good thing for Amazon, and for self-publishing authors. As Jason pointed out, the Kindle is more than a device among the various available – it is a distribution channel. As a reader, you may have a preference, or as can be the case with Apple an open prejudice. We’ll let Bezos and Jobs worry about those manufacturing and marketing details.
As an author, these devices are much more than readers, they are distribution channels from the Espresso Book Machine all the way up to Ingram. Instead of being readers, the Kindle and iPad are for authors important distribution channels.
Be sure to check with your publisher about options distributing through as many as possible.
Self Publishing Advisor 
Since you “borrowed” my reporting from http://bookmakingblog.blogspot.com/2010/10/impressions-of-self-publishing-book.html. it would have been nice to credit the source.