I was just about to suggest grabbing your Twitter RSS feed and using your networks RSS module to run it, but I don't see the RSS icon at Twitter. Did they remove it, or is Chrome being strange this morning?
You can connect you Ning and Twitter, but your posts are sent from your network to Twitter. This makes better sense, since posting your tweets on your site works in Twitter's favor since you're directing members (current and prospective) to Twitter. Posting content from your site to Twitter brings members to your network.
Either way, I think you'll find this discussion useful to you.
thanks so much Thunder. Yes, I want to post from my Twitter to the Ning network. I read through the discussion and it only looks like they were talking about the other way - Ning to Twitter. We already do that and it's effective, but want to use Twitter to have more content on our networks. I'd be grateful for any ideas.