Niche is Physical Therapy and Sports medicine. Methods of marketing are site, blog and newsletter.
Not sure if this is what you're looking for, but a friend of mine started this: http://bemaven.co/
Here's a summary from their site:
We brainstorm, write, and publish world-class stories on your behalf. We turn your ideas into powerful thought pieces.
Our tech platform works in the background to quietly deliver remarkably pleasing results. Building your personal brand is our worry, not yours.
We work with you to develop a consistent voice that becomes the cornerstone of your personal brand — by combining software and services.
Our platform combines new school data analytics and old school media partnerships. It’s the art and science of getting your voice heard.