Following tests in recent weeks, Facebook is officially releasing a new version of its multi-friend selector for applications. The updated tool, as we’ve covered, lets developers include a two-step invite process where users first invite Facebook friends, then invite non-Facebook friends to add the app by importing their full address books from email providers like Yahoo and Google, and other services.

By making it easier for developers to bring in all of a user’s non-Facebook friends at once, apps can potentially grow faster and help bring new users to Facebook itself at the same time.

The change applies to the various selector formats that Facebook makes available, including: friend-selector, multi-friend selector, condensed multi-friend-selector and multi-friend-input.

More details on the process, from Facebook:

Similar to the multi-friend selector tested recently, selected address book contacts will receive an invitation to join Facebook with the name of the originating application included in the body of the email. If any of these contacts creates a Facebook account, the originating application will be bookmarked automatically for that user, and the user ID we passed to you initially will point to that new user.

Developers can disable the address book feature. The change is getting pushed out now.