"hi world".to_lolspeak

Dave Dribin's Daring Furball project was based in Ruby, and so he, being (twisted, brilliant, and) community-minded, created a Ruby Gem for it and made it easily downloadable and installable. If you're set up with Ruby and the right permissions, a simple

gem install lolspeak

should get you started. See the lolspeak page for more details!