Google Data APIs Now All Use OAuth

Google just announced that you can now use OAuth for all of its data APIs.

Announcement on the Google API blog

Nice tutorial on how to get your Ruby site hooked up with OAuth, here: Developing OAuth clients in Ruby

Which involves using the OAuth gem.

OAuth is your valet key for the web, a way of giving site A access to some of your data at site B without giving site A full access to your account at site B.