DotNetKicks is new to me – maybe I’ve been living under a rock. It follows the Digg or Slashdot model of getting users to post stories. comment on them, and kick them (to keep them on the front page). It requires a login, that may be good as it could help prevent the usual flame wars started by anonymous trolls.
This is potentially serious competition for sites like TheServerSide.NET. Certainly it seems to have that elusive x factor in its interface.