dzone: A Digg for Ruby stuff
Okay, the title is a little white lie. DZone is actually a Digg-like site covering all programming and development topics, but recently its Ruby section has become more popular than when I first checked it out a few months ago. With its focus on developers, DZone has a great feel, and I personally feel many of the features are better than those offered by Digg. If you have a Ruby article to promote, give it a try.