JSONP ... and geek's dreams come true.

A lot of company are studying how to use JSONP in their business.

In these days, also Ext.js released a powerful request object to manage JSONP services.

I think it would be useful to post some link that show how the Biggest Framework are moving on this nice way of sharing informations.

MOOTOOLS (my preferred)

http://www.clientcide.com/docs/Request/JsonP

JQUERY

http://docs.jquery.com/Release:jQuery_1.2/Ajax#Cross-Domain_getJSON_.28using_JSONP.29

The new MIT licensed Ext.js core:

http://extjs.com/products/extcore/

JsonP is a means by which to get JSON data from another domain than the one your page is on. If you try and use Ajax to request data from a different domain than the page, you'll get a security error.

One way around this is a concept some call "JsonP". This is where you include a script tag in your document. This script tag points to an external javascript source and when the script tag loads it executes (like any other script tag).

(ref http://www.clientcide.com/wiki/cnet-libraries/06-request/00-jsonp)