Orkut has finally integrated Google Talk into its networking system. You can now chat, call, and instantly receive scraps directly in Orkut friends through Google Talk.

You can automatically include all Orkut friends in your Google Talk friends list or choose which Orkut friends to add.

Google Talk integration includes:

-Receive up to date scrap notifications in Google Talk
-Add Orkut friends to Google Talk friends list
-Show availability status to your Google Talk friends in Orkut

Google Systems Blog also reports additional features which would be shortly integrated-

orkut SMS
With orkut SMS you can send and receive scraps with your mobile phone as well as other cool stuff. You will need to register your mobile phone to use Orkut.

Photo Tagging
You can tag your friends in photos.