I hope the mods won't find this link spammy, but I wrote a blog post with a poll on this topic: "Do you buy indie ebooks from Smashwords?"
http://fridafantastic.wordpress.com/...om-smashwords/
I cover a lot of basics about Smashwords, since mobileread posters are probably the savviest Smashwords-reading folks in the world, I don't offer anything new. But I'm hoping that blog readers who aren't familiar with Smashwords will check it out, and authors who currently only sell ebooks through Amazon will seriously consider Smashwords as an option. The ebook-reading audience is global, and we want to buy books anywhere and in any format!