Pinterest type plugin and theme?

Hey folks,

I have someone inquiring about the below. Do you know of some good plugins and themes that would give this type of result?

We are looking for a Pinterest-type theme or functionality with continuously updated material submitted by registered users on the front page.

Just wanted to get you thoughts . . .

and . . . do you have anything in the WPMUDEV arsenal (or outside too) . . . something simple and not too complicated for owners to manage as well . . .