Mike Gehard's blog
Lately I've had the opportunity to use Jasmine to test drive a whole bunch of Javascript and am loving it. If you haven't had a chance to take Jasmine for a spin, I recommend you take some time to do so.
When I heard that Rails 3.1 was going to include CoffeeScript I decided to work to figure out how I could write both my production code as well as my specs in Coffeescript.