Digg.com is pretty cool resource, it’s Slashdot without the heavy anti-MSFT bias. For Community Server 2.0 there is a module that enable you to easily add either digg.com or reddit.com submissions to your posts.
Also, if you get a chance Digg the Release of Community Server 2.0. We got the beta 3 announcement on the home page of Digg.com 🙂