some interesting link (recently browsed)

Dynamic Script Request (DSR) API

http://tagneto.org/how/reference/js/DynamicScriptRequest.html

Dynodes:

Dynodes: Cross-Domain JS Demo

http://ajaxian.com/archives/dynodes-cross-domain-js-demo

http://www.mindsack.com/uxe/dynodes/

http://www.hedgerwow.com/360/ajax/rss-json/demo.php