Did you know that Pinterest drives more referral traffic than Google Plus, Linkedin, and Youtube COMBINED ? - Shareaholic. Pinterest Marklet for WordPress adds a custom one-click Pinterest Marklet to your site that allows users to quickly pin any image on the page. More Pins = More Traffic = More $$$
Features

Allow users to pin any image, and any YouTube and Vimeo video on the page with one click!
Gorgeous custom Pinterest buttons come in 6 styles 3 different sizes and 2 color schemes.
Sticks to any corner of your site, scrolls with the user!
Onclick support Turn any element of your page into a marklet!
Includes bonus widget Customizable marklet widget can be placed in any of your themes widget areas! Widget can scroll with the page or stay where it belongs, your choice!
Installs in seconds, blazing fast!
Includes full documentation and instructions linked right from the admin panel.

This marklet is certain to increase the number of Pins on your website ten fold!

This plugin makes use of the Custom Pinterest Buttons resource you can get for free here.