Federated Identity and Browser Changes (video)
This video is a great overview of the upcoming changes to browser cookie handling, and how that will affect federated identity in web applications.
Federated identity, at its simplest is where you have app A which delegates to app B for authentication.
The speaker on the video is Heather Flanagan, who is also chair of the Federated Identity community group, which is a w3c group working to ameliorate the upcoming changes.
Cheers,
Dan