You probably want to be on top of developments here if you write clients for any web service requiring a login, particularly a Google service:
In September, we introduced OAuth 1 sign-in controllers to simplify authenticating users from iOS and Mac applications. As the Internet software industry is converging on a newer standard, Google now offers the Google Toolbox for Mac OAuth 2.0 Controllers. This new library enables Cocoa applications to sign in to Google and other services that conform to the latest draft of the OAuth 2.0 standard…
… The Google Data APIs Library for Objective-C now integrates the OAuth 2.0 controllers, making it the preferred way for developers to let users sign in to the library’s many supported APIs.
You can learn more about the OAuth 2.0 protocol by checking out Google’s documentation, and about the GTM OAuth 2.0 controllers by reading the introduction at the project site. Suggestions and questions on the controllers are welcome in the GTM OAuth 2.0 discussion group.
It’s better to be ahead of these kinds of sea changes than behind them … remember the OAuthpocalypse? Yes, we’re not going to find something like that blindsiding us a week before release again. Nuh-uh.