Is there a pluging(s) that can do this…

I was hoping that there’s a plugin here that allow me to do what http://zergnet.com.

It’s website places article links from other network members on their sites to cross-promote their best content. Websites typically receive significantly more visitors to their site than they send to the network, as their content is displayed across the entire network and ZergNet.com.

If there’s a plugin or two that allow me to do this, please point me in the right direction. If not, I think it would be a great idea to develop something like this.