Smashwords is a self-publishing site, and in my opinion the best there is. Everyone who works at Smashwords is very friendly and helpful. Uploading your E-book is a piece of cake, if there is anything you need help with Smashwords has its own E-book called ‘Smashwords style guide’ that you can download for free to help you through the formatting process.
Smashwords give you a lot of options and freedom where publishing is concerned. There is no limit to how long something has to be, so this is a great site to use if you want to publish your collection of short stories.
The price you set is up to you, although the lower the price the more sales you will generate. You can even give you ebook away for free if all you want is some exposure. The profits you make are divided between you and Smashwords, with the writer getting the higher percentage.
I honestly can’t praise this site enough, you won’t find a better home for your e-books. The only downside for me is payment is in US Dollars where as I’m from the UK, but other than that I am very happy and would recommend this site to anyone.