jowilki

This plugin allows you to display thumbnails and links to yours (or anyones!) latest Pins from Pinterest in your sidebar. It is styled after Pinterest and offers a clean and modern look to show off your pins.
This widget is fully customizable, you can:
<ul>
<li>pull the latest pins from any Pinterest user</li>
<li>display only pins from specific boards</li>
<li>choose the number of pins to display</li>
<li>show or hide the image captions</li>
<li>display a “Follow me on Pinterest” button under your pins</li>
</ul>
Features:
<ul>
<li>Clean and Modern Look (like Pinterest)</li>
<li>Looks great on light and dark backgrounds</li>
<li>Captions scale and look nice with long or short text</li>
<li>Semantic HTML</li>
<li>Easy to Install: Simply add a Pinterest username and you’re good to go!</li>
</ul>
More to come when Pinterest opens their API! This project is maintained on github if you’d like to contribute : 
https://github.com/jowilki/pretty-pinterest-pins

Pretty Pinterest Pins

A plugin to show off images, captions, and links from your latest Pinterest activity.

codefish

This plugin adds your favorite pins much like the pinboards on Pinterest. It uses the original thumbnails from Pinterest itself. The plugin aims to have the same look and feel as the pinboords on Pinterest. To improve your site’s performance, the pins are cached every 15 minutes.
The Pinterest Pinboard can be used as a widget in your sidebar or on any page using the shortcode.
<h3>Get Involved</h3>
<ul>
<li>Development and pull requests <a href="https://github.com/codefishnl/wordpress-pinterest-pinboard-widget" rel="nofollow ugc">on GitHub</a></li>
<li>Bug reports and suggestions on <a href="https://wordpress.org/support/plugin/pinterest-pinboard-widget" rel="ugc">WordPress.org forums</a></li>
</ul>

Pinterest Pinboard Widget

A simple must-have widget for the Pinterest addict! Displays thumbnails of your latest Pinterest pins on your website.

Pretty Pinterest Pins vs Pinterest Pinboard Widget