Masonry (Pinterest-style) layout for posts in iThemes Builder
This is a extension (http://ithemes.com/codex/page/Builder_Extensions) for iThemes Builder, a premium WordPress theme.
Instructions on how to use this extension are at http://ithemes.com/codex/page/Builder_Extensions#jQuery_Masonry_Extension_for_Pinterest-Like_Posts_Display
References:
http://paulwp.com/display-wordpress-posts-grid-layout-shapeshift/
http://wp.tutsplus.com/tutorials/theme-development/using-jquery-masonry-for-pinterest-like-posting/