GDC Vault – Social Mechanics for Social Games [SOGS Design] is a link that takes you to the GDC Vault where you can watch a full video of the presentation, with the slides side by side, for free.
Of course, you didn’t need that, right? Because you already paid to get access to the utterly awesome GDC Vault.
There are a couple more free talks released today as well, including the AI rant and an inside look at the Humble Indie Bundle. You can check out all the free talks here.