Embedded below is a video of the presentation Chris Messina gave at the 2010 Google I/O developer’s conference a couple of weeks ago.

Chris has been instrumental in birthing and evangelizing many of the social web’s protocols for sharing data across sites and applications (ActivityStrea.ms, OpenID, OAuth), and he recently went to work on these technologies at Google. Chris is a designer, not necessarily a programmer, so his presentation is light on code. But it very clearly presents the concepts behind social sharing protocols — how they work, why they’re important and how they are currently implemented across the web.

Plus, he apes Lost, and it’s funny.

See Also:

• New ‘OpenID Connect’ Proposal Could Solve Many of the Social Web’s Woes
• Mozilla Gets It Right, Moves Identity Management Into Firefox
• Facebook Adopts Open Standard for User Logins