Just looking around at all available OBII scan cables and software and seems to be a huge selection of stuff, let alone wireless and stuff with little blinky lights to tell you if you'll pass emmisions just a wild selection. I can see where some people would buy some of these things and someone is making money... some might acually be useful!

Then I bumped into this and thought, "Cool!" "Cheap!" But then why?
http://www.amazon.com/dp/B000TMCX72/...0_pd_re_dt_dp7

OK you could use it with this and still hook up a scantool!!! "Cool!" "Cheap!" Still wondering why?
http://www.amazon.com/gp/product/B00...n=&s=&v=glance