To get started, download the client of your choice and try the included samples, which work on a variety of OpenSocial containers. (For reference, the iGoogle endpoints are http://sandbox.gmodules.com/api for REST calls, and http://sandbox.gmodules.com/api/rpc for RPC calls.) When you're ready to do your own iGoogle development, register your application to get the authentication keys you'll need to use the API.
If you have questions or comments, join us in the OpenSocial client libraries group. Have a RESTful (and RPCful) holiday season!
|[NFGB] Link - from iGoogle Developer Blog|
Related From Google Blogs:
Sign in to MySpace, AOL Mail, and Google Books gadgets
The sandbox...it lives!
For every action...
Big canvas, big opportunity