Javascript meets Ruby, in the context of Kiko, a new online calendar application. Specifically, Kiko has implemented a Javascript port of Ruby on Rails' "ActiveRecord" subproject, for implementing the "model" facet of an MVC (model-view-controller) application. If record/model have you thinking data/database you'd be correct, and if you're thinking AJAX so Javascript can talk to the backend, you'd be correct again; see http://www.kiko.com/jsactiverecord/ for an abstract/tutorial and source code, a snippet of which is:
var me = types.user.create({email:"", password:"pass"});
Note, that is not XML being passed but rather a Javascript "object literal", or JSON. No wonder Kiko, though barely a month old and still in beta, is being held up as a shining showcase for cutting edge Javascript technology.