Share 'small publishers/self publishing'

I've been noticing the plethora of small publishing shops springing up; those that charge the author (gasp!) and those that don't, and while I do appreciate the opportunity for all and all to get published, I’m wondering if some of these firms should come with a warning? What really bothers me is those that charge the author for publishing; I have no doubt this has been hashed out before here, an…