I've written an article on micro-frameworks, featuring Sinatra for Ruby and Limonade for PHP. You can read the story online at http://www.linux-mag.com/id/7324.
I also wrote an intro to the Ruby debugger and how to use it in Rails. You can find it online at http://www.linux-mag.com/id/7319. I hope the story increases awareness of the debugger's usefulness.
I am always looking to write topics helpful to the community, so please send suggestions, if you have any.