Google news gadget not updating
Here are your gadget hosting options: Gadgets are just HTML and (optionally) Java Script, Flash or Silverlight wrapped in XML.The Gadget Developer Guide provides all necessary details for building your own gadgets.
Gadgets also allow you to include dynamic content that would otherwise be prevented by Sites security checks.
Gadget specs are cached unless you tell Sites not to.
To bypass the cache during development, add this to the end of the Sites page URL containing the gadget (and not the URL of the gadget spec file): parameters that can be configured.
Regardless of what your gadget does, its files must reside on the World Wide Web to be found and used.
Any online location accessible over HTTP without authentication will do.