Random Avatar Generator
Get a random avatar, in a variety of sizes. An easy shell one-liner. Will print out a list of URLs.
curl -s 'http://realbusinessmen.tumblr.com/api/read?type=photo&num=50' | ruby -r'rexml/document' -e 'puts REXML::Document.new(STDIN).elements["tumblr/posts"].to_a.shuffle.pop.map(&:text)'