Publish2 is a new venture on the eve of going beta. Founder Scott Karp describes the project thus:

Here’s the short version: Publish2 is a social network and 2.0 platform for journalists (and independent “news bloggers,” “citizen” journalists, student journalists, i.e. ALL journalists, BROADLY defined), which aims to put journalists at the center of news on the web by creating a journalist-powered news aggregator.

If you want the long version, read his post.