With help of paper.li's Nomad widget it has become very easy to integrate your paper with your Ning site. Check out what I did here: http://www.dutchroadrunners.nl/page/nieuws-1#.UKH8yuS8-vk. This is a newspaper bringing our members all running/athletics news from the Netherlands. This paper is updated daily (automatically) and is fed with a Twitter list and RSS feeds.
A second thing I managed to do is to integrate a paper.li newspaper with the drop-down menu on our frontpage (check www.dutchroadrunners.nl). This allowed me to create an event-specific newspaper (zevenheuvelenloop 2012). I used twitter hashtags, rss feeds (google news) and Twitter accounts to feed the newspaper. As the event approaches more news develops and I go from a weekly, to daily to twice-per-day update (these are settings, the newspaper upates automatically).