I typically am not a fan of these types of programs, but they have their uses if you spend the time to customize them.
http://scrapebox.com/
This is a program you would use to, ‘in theory’, harvest info on your competition and also get some relevant keywords and back links for SEO and traffic. My guess is most of the blogs are complete shit and you are better off spending your time and energy on a link-spun or thunder-ball for trading and building links.
However, one of the guys I consult for hit me up a rave on this program. So it may be worth some checking out.