Oliver Steele lives in Western Massachusetts and commutes to downtown LA, where he is bringing an operating system from handwaving to reality. He was the architect of OpenLaszlo, the author of PyWordNet and other open source projects. His interests include programming languages, knowledge representation, information visualization, and math education. [more]
You may want to take a look at Dr. Nic's newjs gem: http://newjs.rubyforge.org/.
It's not RSpec, but it gives you unit tests for your JavaScript. There is also JsUnit, which I've seen but don't know much about.