It would be good to add two or three sentences how to use Capybara without Cucumber. I had to google this topic http://techiferous.com/2010/04/using-capybara-in-rails-3/
I’ve just finished writing my first tests in Capybara / Selenium. And I am impressed. Finally something which actually works with Ajax. One year ago I lost 3 days trying to test Ajax actions with Webrat / Selenium. Hopefully Capybara uses new Selenium 2.0. That version switched to something called WebDriver. Selenium version 1.* used mainly JS and was very buggy.