I self-publish my work through Smashwords, and they farm my short stories out to other retailers like Barnes & Noble, iTunes, Scribd, and others. That is known.
What’s unknown is who else is an authorized dealer. Today I was trying to figure out how to get into my Google Books account, since they’ve revised the site, in case I need to delete a title or upload a new one. Instead, I found my short stories for sale on a Netherlands URL (and at a discount, no less).