This is a fascinating post in which CPA Scot Justice (The Virtual CFO) talks about his blog and Twitter usage as marketing tools stating that 75% of his business comes from these efforts.  Bill Seaver of Nashville-based MicroExplosion Media made this cool video and great to see this type of thing coming from Nashville (where I was born and mostly grew up). 

The true test of any technology or innovation is its application to the mainstream or practical users.  Scot is definitely on the front end of the curve but the adoption of these tools by a CPA who is himself a small business is an indication of things to come.

The rules of marketing are definitely changing as are the costs to reach and engage customers.  The bar is much higher so if you don't have the expertise or lack authenticity you'll be found out quickly and treated without mercy.