It looks like full iCloud integration — with much-needed auto login — is finally making its way to OS X with the Mountain Lion update. That means it’ll soon be easier than ever to share data between your Apple computers and iDevices. Pages, Numbers, Keynote. Preview, and TextEdit will all be supported. Additionally, three new apps will be added to Mac’s repertoire at the outset: Messages, Reminders, and Notes. Says Apple:

With Mountain Lion we built support for iCloud right in. When you sign in with your account, we configure all of your apps and your content is up to date across devices.

We’re also bringing integration with your documents with a feature we’re calling “Documents in the Cloud.” When you launch Pages, it shows all the docs you have in the cloud. And it makes these available across all of your devices. We have a developer SDK, so you can add support.