Enter Orkut application key: To get this you need to setup a Orkut App
Enter Orkut secret key: To get this you need to setup a Orkut App
Limit to send messages [For Invitex] : Needed for Invitex only. Ignore if you do not use Invitex.
Limit for status update [For Broadcast] : Set this to 3-5 . This is the number of Statuses that should be fetched from Facebook for each connected user everytime the cron runs
Setting up th Orkut Application to get the above Keys
The steps to get the App key and Secret key are exactly same as Gmail .Both App key and Secret key used for Gmail API plugin can be used for the Orkut API plugin also. Please refer the point 'B.Gmail API plugin' in this documentation for setting the keys.