PlanetRubyOnRails.com – Automatic Rails Blog Aggregator
Pratik Naik of Thinkwares (an Indian Rails development house) wrote to me to announce the launch of PlanetRubyOnRails.com, an automatic 'river of news' style aggregator of Ruby and Rails blogs. If it sounds familiar, it's because PlanetRubyOnRails.org has been doing the same for a while now, but, as Pratik explains: "One of the main reason why we did it is because planetrubyonrails.org is maintained by noone. I had changed my blog address and I couldn't get it changed there."
There's a little innovation too. PlanetRubyOnRails.com supports dynamic subdomains so that you can narrow down on the sort of posts you want to read. For example, http://rjs.planetrubyonrails.com/ narrows down to posts that are about RJS. There are also RSS feeds you can subscribe to.
I've never been keen on the various "Planet" sites that are available, as often the constituent bloggers make posts that are off topic and contaminate the aggregator, but Pratik and his team have done a solid job here and put a good interface on top of a tried and tested idea.