http://dojotoolkit.org/documentation/tutorials/1.6/ajax/
http://dojotoolkit.org/documentation/tutorials/1.6/ajax/demo/dojoioscript-jsonp.html
equivalent: http://search.twitter.com/search.json?q=sustainability (except with dojo defined callback)
doc: https://dev.twitter.com/docs/api/1/get/search