I\'m working with some sample code here:
http://code.google.com/p/google-api-java-client/source/browse/picasa-android-sample/src/main/java/com/google/api/services/sa
You can revoke account permissons on ...
https://security.google.com/settings/security/permissions
You can get there by [Account Settings] > [Account Permissions]
Proof that this answer is the real deal: