Hi Rajan, I have had a fair amount of traffic from Pinterest. I enjoy the site for my personal use and I don't just pin hubs. There are several beautiful and interesting sites and things to see and explore. It is a great place for inspiring ideas and trends too. As for promoting hubs, I agree with those above - having great pictures are very important for grabbing attention. The various boards make it easy to organize your hubs and sites by topic areas. According to my traffic sources on my accounts page - I've had over 200 views from pintrest in a month. I also noticed a greater increase of pinterest traffic since HP added the 'Pin" icon. So yes, I do see it as a wonderful opportunity to increase visibility and drive external traffic to my hubs. This in-turn helps create opportunities for back-links. Many pinners have their own blogs and might choose to feature your hub on their site. Pinners also tweet and share on Facebook. :)
Tip - Try not to just follower hubbers. Expand your follow/follower base. This will help bring in visibility from the general public.
Great question Rajan - thanks for asking. By the way, I see lots of nice 'Healthy' articles on pinterest and I have a 'healthy board' on pinterest. Your hubs would do awesome on there with eye-catching fresh pictures. See you there :)