MurmuringSpider is a concise Twitter crawler. When we write a data-mining / text-mining application based on twitter timeline, we have to collect and store tweets first. I am irritated with writing such crawler repeatedly, so I wrote this. What you have to do is only to add query and to run them periodically. Thanks to consistent Twitter API and twitter gem (http://twitter.rubyforge.org/), it is quite easy to track various types of timelines (such as user_timeline, home_timeline, search...)