I've just joined Pinterest---hard to believe but I'm currently exploring this product for the first time.
I buy products that I need from one of my web customers and recently pinned a product I loved as a reference on my personal Pinterest page. The product pinned was one that I wanted to save as an idea for a future product.
I was surprised at the impact this pin made. It was re-pinned almost immediately by others and the pin included the original link back to my customer's page in an easy unintrusive way. It will be interesting to discover if this type of action results in sales or inquiry activity. It certainly has increased interest in the product.