Somebody mentioned earlier that there is too much porn on Smashwords.
This may well be because the erotica industry has embraced the ebook faster than anyone else. If you have porn on your ereader...nobody knows you're reading porn.
However, his concern was that the porn was drowning out the other stuff. I would point out there is a far greater concern.
The crap drowning out the good stuff. We're in a publishing wild west right now, with people bypassing the traditional gatekeepers of quality (agents and editors). I once read a short story in which the definition of 'professional editor' had changed completely. Instead of producing books or anthologies, professional editors were paid by readers to make personalized recommendations.
Maybe we need people to start that service...