Share 'Digg/Reddit-like section... thoughts?'

I'm planning to create a Digg/Reddit-like section on my network. Trying to figure out what the best way would be to go about it... Obvious choices to me are running Pligg on a different server and somehow making the connection on the Ning site, or even just somehow working with a subreddit (you can create 'subreddits' now) and integrating that with iframes or something... Any thoughts?