Originally Posted by Jdoughs

Weight or juice is no longer SAVED by adding a nofollow attribute. It will still listen to the nofollow and not pass any juice onto that site. BUT IT WILL NOT SAVE IT and distribute it across your site.

Adding nofollow only stops you from passing weight onto the nofollowed link, but does not in ANY WAY return that juice to your pages or build up 'more' page rank or juice to your existing pages.

You gain NOTHING by running nofollow links.