If you are using PHP; the latest PHP SDK located here.
http://code.google.com/p/opensocial-php-client/source/checkout
There
are plenty of examples for all endpoints and this utilizes the newest
v0.9 REST endpoints.
If not, you can find a complete list of opensocial SDK's here:
http://wiki.developer.myspace.com/index.php?title=OpenSocial_Client_Libraries
NOTE: currently only the PHP, Java and C# librarys are v0.9 complient
Thanks,
Jesse