Looking for a WordPress theme similar to a Tumblr theme

Hello all,
I’ve been looking for quite some time for a WordPress theme that is similar to the following Tumblr theme:

http://shanerebenschied.tumblr.com/

Essentially, the front page of the site is a grid of images that are automatically arranged based on the dimensions of the images. The images themselves are not cropped thumbnails, but are instead scaled versions of the image in the post. Clicking on one of the images takes you to the post page for that image.

Does anyone happen to know of a WordPress theme that functions in a similar way?

Thanks for your time!