Although it’s taken a lot longer than expected, and is still highly restricted, MySpace today announced the launch of applications invitations (what it’s calling ACC or Application Communications Channel).

Here’s how MySpace invites work:

• App invites can only be sent to 1 friend at a time (though MySpace says this is only for now)
• There can be “no incentives” to users for sending app invites
• App invites aree viewed in a new “Notifications” folder in the MySpace Mail Center
• The invite have a 1-click flow to add the app, but the link text cannot be customized

MySpace’s VP of Product Kyle Brinkman writes,

We expect App Invites to be a really important feature for getting the word out about your apps. While we are still supporting messages, comments, and bulletins, App Invites give you a much more direct way to let your users invite their friends to get your app: the ux is cleaner, the user “workflow” simpler and faster, and Invites are easier to find and recognize. Additionally, App Invites get their own indicator item on the User Home Page!

Developers can check out documentation on MySpace invites here.