Kit Whitfield blogs from the UK on publishing "scams" and "fake publishing houses", but the information is just as relevant in the US, as PublishAmerica is one company looked at. A big problem is that the majority of writers out there with their manuscript in one hand and their dreams of fame and riches in the other, will never read information such as this.
I've been doing a lot of research this month on indie publishers, and I've been finding a much larger number of companies that are will to help you "publish" your book than I realized existed. It is becoming a large marketplace, and there are fistsfull of cash to be extracted from naive authors.
So now we have some of the companies that will sell you the chance to win a meaningless book award (Yippie!) -- that's a whole 'nuther scam to talk about someday -- offering to help you "publish" your book with promises of promoting it to huge sales. Slick, ethics-free, websites make it all sound so simple.