Well, the American Dental Association, the 500 species of bacteria in your mouth and I disagree. Studies are conducted every day and some of the more sensational results find their way into the news. What people need to remember is that for a study to be scientifically sound, it has to have a large sample base (lots of people in the study) and it has to be conducted over a long period of time. (for example, periodontal disease does not occur in a short period of time).
After many years practicing as a dentist, I have seen firsthand what not flossing your teeth can do to your oral health. And if you still think flossing is not necessary, you better keep my phone number handy! Sure, I'd love your business, but I'd much rather see a healthy mouth than one destroyed by tooth decay.
Here is a great little video on how to floss properly.